diff --git a/railties/lib/rails.rb b/railties/lib/rails.rb
index e9c96c7b437..5d862e3fecc 100644
--- a/railties/lib/rails.rb
+++ b/railties/lib/rails.rb
@@ -46,7 +46,7 @@ module Rails
 
     def backtrace_cleaner
       @backtrace_cleaner ||= begin
-        # Relies on Active Support, so we have to lazy load to postpone definition until AS has been loaded
+        # Relies on Active Support, so we have to lazy load to postpone definition until Active Support has been loaded
         require "rails/backtrace_cleaner"
         Rails::BacktraceCleaner.new
       end