diff --git a/app/controllers/sis_imports_api_controller.rb b/app/controllers/sis_imports_api_controller.rb
index 810ab49fb6c..314bc98b3ec 100644
--- a/app/controllers/sis_imports_api_controller.rb
+++ b/app/controllers/sis_imports_api_controller.rb
@@ -90,13 +90,20 @@ class SisImportsApiController < ApplicationController
           file_obj.set_file_attributes("sis_import.#{params[:extension]}",
                                 Attachment.mimetype("sis_import.#{params[:extension]}"))
         else
+          env = request.env.dup
+          env['CONTENT_TYPE'] = env["ORIGINAL_CONTENT_TYPE"]
+          # copy of request with original content type restored
+          request2 = Rack::Request.new(env)
+          charset = request2.media_type_params['charset']
+          if charset.present? && charset.downcase != 'utf-8'
+            return render :json => { :error => "Invalid content type, UTF-8 required" }, :status => 400
+          end
           params[:extension] ||= {"application/zip" => "zip",
                                   "text/xml" => "xml",
                                   "text/plain" => "csv",
-                                  "text/csv" => "csv"}[
-                                  request.env['ORIGINAL_CONTENT_TYPE']] || "zip"
+                                  "text/csv" => "csv"}[request2.media_type] || "zip"
           file_obj.set_file_attributes("sis_import.#{params[:extension]}",
-                                request.env['ORIGINAL_CONTENT_TYPE'])
+                                request2.media_type)
         end
       end
       batch = SisBatch.create_with_attachment(@account, params[:import_type], file_obj)
diff --git a/spec/apis/v1/sis_imports_api_spec.rb b/spec/apis/v1/sis_imports_api_spec.rb
index f4b42f5a239..73737f3d71d 100644
--- a/spec/apis/v1/sis_imports_api_spec.rb
+++ b/spec/apis/v1/sis_imports_api_spec.rb
@@ -112,4 +112,42 @@ describe SisImportsApiController, :type => :integration do
     batch.batch_mode_term.should == term
   end
 
+  it "should allow raw post without charset" do
+    json = api_call(:post,
+          "/api/v1/accounts/#{@account.id}/sis_imports.json?import_type=instructure_csv",
+          { :controller => 'sis_imports_api', :action => 'create',
+            :format => 'json', :account_id => @account.id.to_s,
+            :import_type => 'instructure_csv' },
+          {},
+          { 'content-type' => 'text/csv' })
+    batch = SisBatch.last
+    batch.attachment.filename.should == "sis_import.csv"
+    batch.attachment.content_type.should == "text/csv"
+  end
+
+  it "should handle raw post content-types with attributes" do
+    json = api_call(:post,
+          "/api/v1/accounts/#{@account.id}/sis_imports.json?import_type=instructure_csv",
+          { :controller => 'sis_imports_api', :action => 'create',
+            :format => 'json', :account_id => @account.id.to_s,
+            :import_type => 'instructure_csv' },
+          {},
+          { 'content-type' => 'text/csv; charset=utf-8' })
+    batch = SisBatch.last
+    batch.attachment.filename.should == "sis_import.csv"
+    batch.attachment.content_type.should == "text/csv"
+  end
+
+  it "should reject non-utf-8 encodings on content-type" do
+    json = raw_api_call(:post,
+          "/api/v1/accounts/#{@account.id}/sis_imports.json?import_type=instructure_csv",
+          { :controller => 'sis_imports_api', :action => 'create',
+            :format => 'json', :account_id => @account.id.to_s,
+            :import_type => 'instructure_csv' },
+          {},
+          { 'content-type' => 'text/csv; charset=ISO-8859-1-Windows-3.0-Latin-1' })
+    response.status.should match(/400/)
+    SisBatch.count.should == 0
+  end
+
 end