diff --git a/activesupport/lib/active_support/inflections.rb b/activesupport/lib/active_support/inflections.rb
index c04c2ed15b9ea545f3f9397f00a4f923c3799c1b..ca2d8cb270e4a0db935de0c90dd516a2ca896cfe 100644
--- a/activesupport/lib/active_support/inflections.rb
+++ b/activesupport/lib/active_support/inflections.rb
@@ -1,3 +1,5 @@
+require 'active_support/inflector/inflections'
+
 module ActiveSupport
   Inflector.inflections do |inflect|
     inflect.plural(/$/, 's')
diff --git a/activesupport/lib/active_support/inflector/inflections.rb b/activesupport/lib/active_support/inflector/inflections.rb
index 600e353812e59aa3cde6598512df8eccf1d20440..c9e50a946296a60224f4be19267aaad4553c309b 100644
--- a/activesupport/lib/active_support/inflector/inflections.rb
+++ b/activesupport/lib/active_support/inflector/inflections.rb
@@ -2,6 +2,8 @@
 
 module ActiveSupport
   module Inflector
+    extend self
+
     # A singleton instance of this class is yielded by Inflector.inflections, which can then be used to specify additional
     # inflection rules.
     #
diff --git a/activesupport/lib/active_support/inflector/methods.rb b/activesupport/lib/active_support/inflector/methods.rb
index 2acc6ddee588590fdead7d30f9c35c014c89d5a3..c14a43de0d3a73f7d0515d00b9a9343c786864a3 100644
--- a/activesupport/lib/active_support/inflector/methods.rb
+++ b/activesupport/lib/active_support/inflector/methods.rb
@@ -1,6 +1,7 @@
 # encoding: utf-8
 
 require 'active_support/inflector/inflections'
+require 'active_support/inflections'
 
 module ActiveSupport
   # The Inflector transforms words from singular to plural, class names to table names, modularized class names to ones without,