diff --git a/actionmailer/lib/action_mailer/base.rb b/actionmailer/lib/action_mailer/base.rb
index 0519783d02e..793cd53518e 100644
--- a/actionmailer/lib/action_mailer/base.rb
+++ b/actionmailer/lib/action_mailer/base.rb
@@ -2,6 +2,7 @@ require 'mail'
 require 'action_mailer/tmail_compat'
 require 'action_mailer/collector'
 require 'active_support/core_ext/array/wrap'
+require 'active_support/core_ext/object/blank'
 
 module ActionMailer #:nodoc:
   # Action Mailer allows you to send email from your application using a mailer model and views.
diff --git a/actionmailer/lib/action_mailer/old_api.rb b/actionmailer/lib/action_mailer/old_api.rb
index c7f341d46ce..7c59a8ae508 100644
--- a/actionmailer/lib/action_mailer/old_api.rb
+++ b/actionmailer/lib/action_mailer/old_api.rb
@@ -1,4 +1,5 @@
 require 'active_support/core_ext/object/try'
+require 'active_support/core_ext/object/blank'
 
 module ActionMailer
   module OldApi #:nodoc:
diff --git a/actionpack/lib/action_controller/metal/http_authentication.rb b/actionpack/lib/action_controller/metal/http_authentication.rb
index 6ec788f302b..424828f7e8b 100644
--- a/actionpack/lib/action_controller/metal/http_authentication.rb
+++ b/actionpack/lib/action_controller/metal/http_authentication.rb
@@ -1,4 +1,5 @@
 require 'active_support/base64'
+require 'active_support/core_ext/object/blank'
 
 module ActionController
   module HttpAuthentication
diff --git a/actionpack/lib/action_controller/metal/renderers.rb b/actionpack/lib/action_controller/metal/renderers.rb
index d906e1fb5b1..aebd71e867a 100644
--- a/actionpack/lib/action_controller/metal/renderers.rb
+++ b/actionpack/lib/action_controller/metal/renderers.rb
@@ -1,4 +1,5 @@
 require 'active_support/core_ext/class/attribute'
+require 'active_support/core_ext/object/blank'
 
 module ActionController
   def self.add_renderer(key, &block)
diff --git a/actionpack/lib/action_controller/railties/log_subscriber.rb b/actionpack/lib/action_controller/railties/log_subscriber.rb
index c2299d0b05c..00ac3bdf674 100644
--- a/actionpack/lib/action_controller/railties/log_subscriber.rb
+++ b/actionpack/lib/action_controller/railties/log_subscriber.rb
@@ -1,3 +1,5 @@
+require 'active_support/core_ext/object/blank'
+
 module ActionController
   module Railties
     class LogSubscriber < Rails::LogSubscriber
diff --git a/actionpack/lib/action_controller/test_case.rb b/actionpack/lib/action_controller/test_case.rb
index 120f34460e0..306db4a4315 100644
--- a/actionpack/lib/action_controller/test_case.rb
+++ b/actionpack/lib/action_controller/test_case.rb
@@ -1,4 +1,5 @@
 require 'rack/session/abstract/id'
+require 'active_support/core_ext/object/blank'
 
 module ActionController
   module TemplateAssertions
diff --git a/actionpack/lib/action_dispatch/http/cache.rb b/actionpack/lib/action_dispatch/http/cache.rb
index d2404e63c55..9b9e81440b3 100644
--- a/actionpack/lib/action_dispatch/http/cache.rb
+++ b/actionpack/lib/action_dispatch/http/cache.rb
@@ -1,3 +1,5 @@
+require 'active_support/core_ext/object/blank'
+
 module ActionDispatch
   module Http
     module Cache
diff --git a/actionpack/lib/action_dispatch/http/mime_type.rb b/actionpack/lib/action_dispatch/http/mime_type.rb
index 3f1a77295d8..d6a805bf3b1 100644
--- a/actionpack/lib/action_dispatch/http/mime_type.rb
+++ b/actionpack/lib/action_dispatch/http/mime_type.rb
@@ -1,5 +1,6 @@
 require 'set'
 require 'active_support/core_ext/class/attribute_accessors'
+require 'active_support/core_ext/object/blank'
 
 module Mime
   class Mimes < Array
diff --git a/actionpack/lib/action_dispatch/http/response.rb b/actionpack/lib/action_dispatch/http/response.rb
index 9cfe5a5ea9c..362e5ec9709 100644
--- a/actionpack/lib/action_dispatch/http/response.rb
+++ b/actionpack/lib/action_dispatch/http/response.rb
@@ -1,5 +1,6 @@
 require 'digest/md5'
 require 'active_support/core_ext/module/delegation'
+require 'active_support/core_ext/object/blank'
 
 module ActionDispatch # :nodoc:
   # Represents an HTTP response generated by a controller action. One can use
diff --git a/actionpack/lib/action_dispatch/http/upload.rb b/actionpack/lib/action_dispatch/http/upload.rb
index dc6121b9111..81d25173046 100644
--- a/actionpack/lib/action_dispatch/http/upload.rb
+++ b/actionpack/lib/action_dispatch/http/upload.rb
@@ -1,3 +1,5 @@
+require 'active_support/core_ext/object/blank'
+
 module ActionDispatch
   module Http
     module UploadedFile
diff --git a/actionpack/lib/action_dispatch/middleware/session/abstract_store.rb b/actionpack/lib/action_dispatch/middleware/session/abstract_store.rb
index 311880cabc9..dddedc832fa 100644
--- a/actionpack/lib/action_dispatch/middleware/session/abstract_store.rb
+++ b/actionpack/lib/action_dispatch/middleware/session/abstract_store.rb
@@ -1,5 +1,6 @@
 require 'rack/utils'
 require 'rack/request'
+require 'active_support/core_ext/object/blank'
 
 module ActionDispatch
   module Session
diff --git a/actionpack/lib/action_dispatch/middleware/session/cookie_store.rb b/actionpack/lib/action_dispatch/middleware/session/cookie_store.rb
index 22da82479e3..3331b7c25e3 100644
--- a/actionpack/lib/action_dispatch/middleware/session/cookie_store.rb
+++ b/actionpack/lib/action_dispatch/middleware/session/cookie_store.rb
@@ -1,4 +1,5 @@
 require 'active_support/core_ext/hash/keys'
+require 'active_support/core_ext/object/blank'
 
 module ActionDispatch
   module Session
diff --git a/actionpack/lib/action_dispatch/routing/deprecated_mapper.rb b/actionpack/lib/action_dispatch/routing/deprecated_mapper.rb
index dd650e83d90..b0545279b12 100644
--- a/actionpack/lib/action_dispatch/routing/deprecated_mapper.rb
+++ b/actionpack/lib/action_dispatch/routing/deprecated_mapper.rb
@@ -1,3 +1,5 @@
+require 'active_support/core_ext/object/blank'
+
 module ActionDispatch
   module Routing
     class RouteSet
diff --git a/actionpack/lib/action_dispatch/routing/mapper.rb b/actionpack/lib/action_dispatch/routing/mapper.rb
index 5a3868e1d45..26f0e14e727 100644
--- a/actionpack/lib/action_dispatch/routing/mapper.rb
+++ b/actionpack/lib/action_dispatch/routing/mapper.rb
@@ -1,4 +1,5 @@
 require 'active_support/core_ext/hash/except'
+require 'active_support/core_ext/object/blank'
 
 module ActionDispatch
   module Routing
diff --git a/actionpack/lib/action_dispatch/testing/test_request.rb b/actionpack/lib/action_dispatch/testing/test_request.rb
index 20288aa7a52..090e03cf443 100644
--- a/actionpack/lib/action_dispatch/testing/test_request.rb
+++ b/actionpack/lib/action_dispatch/testing/test_request.rb
@@ -1,3 +1,5 @@
+require 'active_support/core_ext/object/blank'
+
 module ActionDispatch
   class TestRequest < Request
     DEFAULT_ENV = Rack::MockRequest.env_for('/')
diff --git a/actionpack/lib/action_view/helpers/capture_helper.rb b/actionpack/lib/action_view/helpers/capture_helper.rb
index f0be8147003..20598237e99 100644
--- a/actionpack/lib/action_view/helpers/capture_helper.rb
+++ b/actionpack/lib/action_view/helpers/capture_helper.rb
@@ -1,3 +1,5 @@
+require 'active_support/core_ext/object/blank'
+
 module ActionView
   module Helpers
     # CaptureHelper exposes methods to let you extract generated markup which
diff --git a/actionpack/lib/action_view/helpers/form_helper.rb b/actionpack/lib/action_view/helpers/form_helper.rb
index 2ba5339b7db..7b5b3ae0007 100644
--- a/actionpack/lib/action_view/helpers/form_helper.rb
+++ b/actionpack/lib/action_view/helpers/form_helper.rb
@@ -4,6 +4,7 @@ require 'action_view/helpers/tag_helper'
 require 'action_view/helpers/form_tag_helper'
 require 'active_support/core_ext/class/inheritable_attributes'
 require 'active_support/core_ext/hash/slice'
+require 'active_support/core_ext/object/blank'
 
 module ActionView
   module Helpers
diff --git a/actionpack/lib/action_view/helpers/form_options_helper.rb b/actionpack/lib/action_view/helpers/form_options_helper.rb
index 4c523d4b200..11c6351bd3e 100644
--- a/actionpack/lib/action_view/helpers/form_options_helper.rb
+++ b/actionpack/lib/action_view/helpers/form_options_helper.rb
@@ -1,6 +1,7 @@
 require 'cgi'
 require 'erb'
 require 'action_view/helpers/form_helper'
+require 'active_support/core_ext/object/blank'
 
 module ActionView
   module Helpers
diff --git a/actionpack/lib/action_view/helpers/form_tag_helper.rb b/actionpack/lib/action_view/helpers/form_tag_helper.rb
index 07694f5ebb1..ca100e102e0 100644
--- a/actionpack/lib/action_view/helpers/form_tag_helper.rb
+++ b/actionpack/lib/action_view/helpers/form_tag_helper.rb
@@ -1,6 +1,7 @@
 require 'cgi'
 require 'action_view/helpers/tag_helper'
 require 'active_support/core_ext/object/returning'
+require 'active_support/core_ext/object/blank'
 
 module ActionView
   module Helpers
diff --git a/actionpack/lib/action_view/helpers/number_helper.rb b/actionpack/lib/action_view/helpers/number_helper.rb
index 719b64b9403..605e5d58738 100644
--- a/actionpack/lib/action_view/helpers/number_helper.rb
+++ b/actionpack/lib/action_view/helpers/number_helper.rb
@@ -1,5 +1,6 @@
 require 'active_support/core_ext/big_decimal/conversions'
 require 'active_support/core_ext/float/rounding'
+require 'active_support/core_ext/object/blank'
 
 module ActionView
   module Helpers #:nodoc:
diff --git a/actionpack/lib/action_view/helpers/prototype_helper.rb b/actionpack/lib/action_view/helpers/prototype_helper.rb
index ccdc8181db9..ebe0b4e876b 100644
--- a/actionpack/lib/action_view/helpers/prototype_helper.rb
+++ b/actionpack/lib/action_view/helpers/prototype_helper.rb
@@ -1,6 +1,7 @@
 require 'set'
 require 'active_support/json'
 require 'active_support/core_ext/object/returning'
+require 'active_support/core_ext/object/blank'
 
 module ActionView
   module Helpers
diff --git a/actionpack/lib/action_view/helpers/tag_helper.rb b/actionpack/lib/action_view/helpers/tag_helper.rb
index 9b4cacd4d74..c09d01eeee9 100644
--- a/actionpack/lib/action_view/helpers/tag_helper.rb
+++ b/actionpack/lib/action_view/helpers/tag_helper.rb
@@ -1,3 +1,4 @@
+require 'active_support/core_ext/object/blank'
 require 'set'
 
 module ActionView
diff --git a/actionpack/lib/action_view/helpers/text_helper.rb b/actionpack/lib/action_view/helpers/text_helper.rb
index 27be1690ddc..0e1bc139ff9 100644
--- a/actionpack/lib/action_view/helpers/text_helper.rb
+++ b/actionpack/lib/action_view/helpers/text_helper.rb
@@ -1,3 +1,4 @@
+require 'active_support/core_ext/object/blank'
 require 'action_view/helpers/tag_helper'
 
 module ActionView
diff --git a/actionpack/lib/action_view/render/partials.rb b/actionpack/lib/action_view/render/partials.rb
index 17d16556b9a..f04a89c1acd 100644
--- a/actionpack/lib/action_view/render/partials.rb
+++ b/actionpack/lib/action_view/render/partials.rb
@@ -1,3 +1,5 @@
+require 'active_support/core_ext/object/blank'
+
 module ActionView
   # There's also a convenience method for rendering sub templates within the current controller that depends on a
   # single object (we call this kind of sub templates for partials). It relies on the fact that partials should
diff --git a/actionpack/lib/action_view/test_case.rb b/actionpack/lib/action_view/test_case.rb
index b0ababe344d..23b0c6e1214 100644
--- a/actionpack/lib/action_view/test_case.rb
+++ b/actionpack/lib/action_view/test_case.rb
@@ -1,3 +1,4 @@
+require 'active_support/core_ext/object/blank'
 require 'action_controller/test_case'
 require 'action_view'
 
diff --git a/activemodel/lib/active_model/errors.rb b/activemodel/lib/active_model/errors.rb
index a9a54a90e0c..8d28040c32c 100644
--- a/activemodel/lib/active_model/errors.rb
+++ b/activemodel/lib/active_model/errors.rb
@@ -1,5 +1,6 @@
 require 'active_support/core_ext/array/wrap'
 require 'active_support/core_ext/string/inflections'
+require 'active_support/core_ext/object/blank'
 require 'active_support/ordered_hash'
 
 module ActiveModel
diff --git a/activemodel/lib/active_model/validator.rb b/activemodel/lib/active_model/validator.rb
index b7c52be3f02..906d239bccf 100644
--- a/activemodel/lib/active_model/validator.rb
+++ b/activemodel/lib/active_model/validator.rb
@@ -1,5 +1,6 @@
 require 'active_support/core_ext/array/wrap'
 require "active_support/core_ext/module/anonymous"
+require 'active_support/core_ext/object/blank'
 
 module ActiveModel #:nodoc:
   # A simple base class that can be used along with 
diff --git a/activerecord/lib/active_record/associations.rb b/activerecord/lib/active_record/associations.rb
index d623ddb9152..37d9c07a22a 100755
--- a/activerecord/lib/active_record/associations.rb
+++ b/activerecord/lib/active_record/associations.rb
@@ -1,5 +1,6 @@
 require 'active_support/core_ext/module/delegation'
 require 'active_support/core_ext/enumerable'
+require 'active_support/core_ext/object/blank'
 
 module ActiveRecord
   class InverseOfAssociationNotFoundError < ActiveRecordError #:nodoc:
diff --git a/activerecord/lib/active_record/associations/has_many_through_association.rb b/activerecord/lib/active_record/associations/has_many_through_association.rb
index bd2acd43409..5338bb099d0 100644
--- a/activerecord/lib/active_record/associations/has_many_through_association.rb
+++ b/activerecord/lib/active_record/associations/has_many_through_association.rb
@@ -1,4 +1,5 @@
 require "active_record/associations/through_association_scope"
+require 'active_support/core_ext/object/blank'
 
 module ActiveRecord
   module Associations
diff --git a/activerecord/lib/active_record/attribute_methods/dirty.rb b/activerecord/lib/active_record/attribute_methods/dirty.rb
index a8698a2f5a3..435aea9b096 100644
--- a/activerecord/lib/active_record/attribute_methods/dirty.rb
+++ b/activerecord/lib/active_record/attribute_methods/dirty.rb
@@ -1,3 +1,5 @@
+require 'active_support/core_ext/object/blank'
+
 module ActiveRecord
   module AttributeMethods
     module Dirty
diff --git a/activerecord/lib/active_record/attribute_methods/query.rb b/activerecord/lib/active_record/attribute_methods/query.rb
index a949d801202..948809c65a3 100644
--- a/activerecord/lib/active_record/attribute_methods/query.rb
+++ b/activerecord/lib/active_record/attribute_methods/query.rb
@@ -1,3 +1,5 @@
+require 'active_support/core_ext/object/blank'
+
 module ActiveRecord
   module AttributeMethods
     module Query
diff --git a/activerecord/lib/active_record/base.rb b/activerecord/lib/active_record/base.rb
index 02db241ee05..b81434c1f7b 100755
--- a/activerecord/lib/active_record/base.rb
+++ b/activerecord/lib/active_record/base.rb
@@ -14,6 +14,7 @@ require 'active_support/core_ext/string/behavior'
 require 'active_support/core_ext/object/singleton_class'
 require 'active_support/core_ext/module/delegation'
 require 'active_support/core_ext/object/duplicable'
+require 'active_support/core_ext/object/blank'
 require 'arel'
 require 'active_record/errors'
 
diff --git a/activerecord/lib/active_record/connection_adapters/abstract/schema_definitions.rb b/activerecord/lib/active_record/connection_adapters/abstract/schema_definitions.rb
index 64faaef4a0c..046825d43f3 100644
--- a/activerecord/lib/active_record/connection_adapters/abstract/schema_definitions.rb
+++ b/activerecord/lib/active_record/connection_adapters/abstract/schema_definitions.rb
@@ -1,3 +1,4 @@
+require 'active_support/core_ext/object/blank'
 require 'date'
 require 'set'
 require 'bigdecimal'
diff --git a/activerecord/lib/active_record/connection_adapters/mysql_adapter.rb b/activerecord/lib/active_record/connection_adapters/mysql_adapter.rb
index 521bd810d0c..55d9d20bb52 100644
--- a/activerecord/lib/active_record/connection_adapters/mysql_adapter.rb
+++ b/activerecord/lib/active_record/connection_adapters/mysql_adapter.rb
@@ -1,5 +1,6 @@
 require 'active_record/connection_adapters/abstract_adapter'
 require 'active_support/core_ext/kernel/requires'
+require 'active_support/core_ext/object/blank'
 require 'set'
 
 module MysqlCompat #:nodoc:
diff --git a/activerecord/lib/active_record/connection_adapters/postgresql_adapter.rb b/activerecord/lib/active_record/connection_adapters/postgresql_adapter.rb
index 31d5266da8c..2ae26246a24 100644
--- a/activerecord/lib/active_record/connection_adapters/postgresql_adapter.rb
+++ b/activerecord/lib/active_record/connection_adapters/postgresql_adapter.rb
@@ -1,5 +1,6 @@
 require 'active_record/connection_adapters/abstract_adapter'
 require 'active_support/core_ext/kernel/requires'
+require 'active_support/core_ext/object/blank'
 
 begin
   require_library_or_gem 'pg'
diff --git a/activerecord/lib/active_record/fixtures.rb b/activerecord/lib/active_record/fixtures.rb
index 79f70f07cdb..22f0e600832 100644
--- a/activerecord/lib/active_record/fixtures.rb
+++ b/activerecord/lib/active_record/fixtures.rb
@@ -4,6 +4,7 @@ require 'csv'
 require 'zlib'
 require 'active_support/dependencies'
 require 'active_support/core_ext/logger'
+require 'active_support/core_ext/object/blank'
 
 if RUBY_VERSION < '1.9'
   module YAML #:nodoc:
diff --git a/activerecord/lib/active_record/named_scope.rb b/activerecord/lib/active_record/named_scope.rb
index 394e1587e1d..11c21a9207d 100644
--- a/activerecord/lib/active_record/named_scope.rb
+++ b/activerecord/lib/active_record/named_scope.rb
@@ -1,6 +1,7 @@
 require 'active_support/core_ext/array'
 require 'active_support/core_ext/hash/except'
 require 'active_support/core_ext/object/singleton_class'
+require 'active_support/core_ext/object/blank'
 
 module ActiveRecord
   module NamedScope
diff --git a/activerecord/lib/active_record/nested_attributes.rb b/activerecord/lib/active_record/nested_attributes.rb
index 76ec7eb681a..ee2d4201948 100644
--- a/activerecord/lib/active_record/nested_attributes.rb
+++ b/activerecord/lib/active_record/nested_attributes.rb
@@ -1,5 +1,6 @@
 require 'active_support/core_ext/hash/except'
 require 'active_support/core_ext/object/try'
+require 'active_support/core_ext/object/blank'
 
 module ActiveRecord
   module NestedAttributes #:nodoc:
diff --git a/activerecord/lib/active_record/query_cache.rb b/activerecord/lib/active_record/query_cache.rb
index eb92bc25450..093c6c1e555 100644
--- a/activerecord/lib/active_record/query_cache.rb
+++ b/activerecord/lib/active_record/query_cache.rb
@@ -1,3 +1,5 @@
+require 'active_support/core_ext/object/blank'
+
 module ActiveRecord
   class QueryCache
     module ClassMethods
diff --git a/activerecord/lib/active_record/relation.rb b/activerecord/lib/active_record/relation.rb
index a20c152eeb1..8577ec58f76 100644
--- a/activerecord/lib/active_record/relation.rb
+++ b/activerecord/lib/active_record/relation.rb
@@ -1,3 +1,5 @@
+require 'active_support/core_ext/object/blank'
+
 module ActiveRecord
   class Relation
     JoinOperation = Struct.new(:relation, :join_class, :on)
diff --git a/activerecord/lib/active_record/relation/batches.rb b/activerecord/lib/active_record/relation/batches.rb
index 4a260d4caab..cb57b445e52 100644
--- a/activerecord/lib/active_record/relation/batches.rb
+++ b/activerecord/lib/active_record/relation/batches.rb
@@ -1,3 +1,5 @@
+require 'active_support/core_ext/object/blank'
+
 module ActiveRecord
   module Batches # :nodoc:
     # Yields each record that was found by the find +options+. The find is
diff --git a/activerecord/lib/active_record/relation/calculations.rb b/activerecord/lib/active_record/relation/calculations.rb
index e77424a64b6..a5ea6e7e3a9 100644
--- a/activerecord/lib/active_record/relation/calculations.rb
+++ b/activerecord/lib/active_record/relation/calculations.rb
@@ -1,3 +1,5 @@
+require 'active_support/core_ext/object/blank'
+
 module ActiveRecord
   module Calculations
     # Count operates using three different approaches.
diff --git a/activerecord/lib/active_record/relation/finder_methods.rb b/activerecord/lib/active_record/relation/finder_methods.rb
index c1cce679b6c..37aaac0894e 100644
--- a/activerecord/lib/active_record/relation/finder_methods.rb
+++ b/activerecord/lib/active_record/relation/finder_methods.rb
@@ -1,3 +1,5 @@
+require 'active_support/core_ext/object/blank'
+
 module ActiveRecord
   module FinderMethods
     # Find operates with four different retrieval approaches:
diff --git a/activerecord/lib/active_record/relation/query_methods.rb b/activerecord/lib/active_record/relation/query_methods.rb
index 0250e739b8f..e2247810165 100644
--- a/activerecord/lib/active_record/relation/query_methods.rb
+++ b/activerecord/lib/active_record/relation/query_methods.rb
@@ -1,3 +1,5 @@
+require 'active_support/core_ext/object/blank'
+
 module ActiveRecord
   module QueryMethods
     extend ActiveSupport::Concern
diff --git a/activerecord/lib/active_record/relation/spawn_methods.rb b/activerecord/lib/active_record/relation/spawn_methods.rb
index 2841ff12395..a17de1bdbb8 100644
--- a/activerecord/lib/active_record/relation/spawn_methods.rb
+++ b/activerecord/lib/active_record/relation/spawn_methods.rb
@@ -1,3 +1,5 @@
+require 'active_support/core_ext/object/blank'
+
 module ActiveRecord
   module SpawnMethods
     def merge(r)
diff --git a/activerecord/lib/active_record/schema.rb b/activerecord/lib/active_record/schema.rb
index a996a0ebac1..a833356d153 100644
--- a/activerecord/lib/active_record/schema.rb
+++ b/activerecord/lib/active_record/schema.rb
@@ -1,3 +1,5 @@
+require 'active_support/core_ext/object/blank'
+
 module ActiveRecord
   # Allows programmers to programmatically define a schema in a portable
   # DSL. This means you can define tables, indexes, etc. without using SQL
diff --git a/activeresource/lib/active_resource/custom_methods.rb b/activeresource/lib/active_resource/custom_methods.rb
index ff14b49b070..dd3e35dfc76 100644
--- a/activeresource/lib/active_resource/custom_methods.rb
+++ b/activeresource/lib/active_resource/custom_methods.rb
@@ -1,3 +1,5 @@
+require 'active_support/core_ext/object/blank'
+
 module ActiveResource
   # A module to support custom REST methods and sub-resources, allowing you to break out
   # of the "default" REST methods with your own custom resource requests.  For example,
diff --git a/activeresource/lib/active_resource/validations.rb b/activeresource/lib/active_resource/validations.rb
index 4774c6dd22a..a19e0d0ac9a 100644
--- a/activeresource/lib/active_resource/validations.rb
+++ b/activeresource/lib/active_resource/validations.rb
@@ -1,4 +1,5 @@
 require 'active_support/core_ext/array/wrap'
+require 'active_support/core_ext/object/blank'
 
 module ActiveResource
   class ResourceInvalid < ClientError  #:nodoc:
diff --git a/activesupport/lib/active_support/xml_mini/libxmlsax.rb b/activesupport/lib/active_support/xml_mini/libxmlsax.rb
index d7b2f4c5be6..fe2c1b93497 100644
--- a/activesupport/lib/active_support/xml_mini/libxmlsax.rb
+++ b/activesupport/lib/active_support/xml_mini/libxmlsax.rb
@@ -1,4 +1,5 @@
 require 'libxml'
+require 'active_support/core_ext/object/blank'
 
 # = XmlMini LibXML implementation using a SAX-based parser
 module ActiveSupport
diff --git a/activesupport/lib/active_support/xml_mini/nokogirisax.rb b/activesupport/lib/active_support/xml_mini/nokogirisax.rb
index d538a9110f7..8af7b5e565e 100644
--- a/activesupport/lib/active_support/xml_mini/nokogirisax.rb
+++ b/activesupport/lib/active_support/xml_mini/nokogirisax.rb
@@ -1,4 +1,5 @@
 require 'nokogiri'
+require 'active_support/core_ext/object/blank'
 
 # = XmlMini Nokogiri implementation using a SAX-based parser
 module ActiveSupport
diff --git a/railties/lib/rails/generators/rails/resource/resource_generator.rb b/railties/lib/rails/generators/rails/resource/resource_generator.rb
index 1e78945a7ef..8a467080095 100644
--- a/railties/lib/rails/generators/rails/resource/resource_generator.rb
+++ b/railties/lib/rails/generators/rails/resource/resource_generator.rb
@@ -1,5 +1,6 @@
 require 'rails/generators/resource_helpers'
 require 'rails/generators/rails/model/model_generator'
+require 'active_support/core_ext/object/blank'
 
 module Rails
   module Generators