diff --git a/actionpack/test/activerecord/render_partial_with_record_identification_test.rb b/actionpack/test/activerecord/render_partial_with_record_identification_test.rb
index 0122bc7d8faea13afc308eb91e41d1200b2f3ec1..df50c3dc6f0f15784ac5a530c5f08f6511c0861b 100644
--- a/actionpack/test/activerecord/render_partial_with_record_identification_test.rb
+++ b/actionpack/test/activerecord/render_partial_with_record_identification_test.rb
@@ -126,7 +126,8 @@ def render_with_record_collection
 end
 
 class Game < Struct.new(:name, :id)
-  extend ActiveModel::APICompliant
+  extend ActiveModel::Naming
+  include ActiveModel::Conversion
   def to_param
     id.to_s
   end
diff --git a/actionpack/test/controller/record_identifier_test.rb b/actionpack/test/controller/record_identifier_test.rb
index 10f51639cfeefcb13007aa340164a8cf1c24e090..44e49ed3f8ec4af8535d94fcd76ead7404a02fbe 100644
--- a/actionpack/test/controller/record_identifier_test.rb
+++ b/actionpack/test/controller/record_identifier_test.rb
@@ -1,7 +1,8 @@
 require 'abstract_unit'
 
 class Comment
-  extend ActiveModel::APICompliant
+  extend ActiveModel::Naming
+  include ActiveModel::Conversion
 
   attr_reader :id
   def save; @id = 1 end
diff --git a/actionpack/test/controller/redirect_test.rb b/actionpack/test/controller/redirect_test.rb
index a71c39e504851e66d3a5712f1523f7ef65a82773..b3321303c0a071b7368083dc86037baa0cda5dec 100644
--- a/actionpack/test/controller/redirect_test.rb
+++ b/actionpack/test/controller/redirect_test.rb
@@ -4,7 +4,8 @@ class WorkshopsController < ActionController::Base
 end
 
 class Workshop
-  extend ActiveModel::APICompliant
+  extend ActiveModel::Naming
+  include ActiveModel::Conversion
   attr_accessor :id, :new_record
 
   def initialize(id, new_record)
diff --git a/actionpack/test/lib/controller/fake_models.rb b/actionpack/test/lib/controller/fake_models.rb
index 07f01e1c47d068923d36e569eb190a4d563d4b85..c6726432ec92df6d7af9b8f2ef500f0a6fae9ff7 100644
--- a/actionpack/test/lib/controller/fake_models.rb
+++ b/actionpack/test/lib/controller/fake_models.rb
@@ -1,7 +1,8 @@
 require "active_model"
 
 class Customer < Struct.new(:name, :id)
-  extend ActiveModel::APICompliant
+  extend ActiveModel::Naming
+  include ActiveModel::Conversion
 
   def to_param
     id.to_s
@@ -16,7 +17,8 @@ class GoodCustomer < Customer
 
 module Quiz
   class Question < Struct.new(:name, :id)
-    extend ActiveModel::APICompliant
+    extend ActiveModel::Naming
+    include ActiveModel::Conversion
 
     def to_param
       id.to_s
diff --git a/actionpack/test/template/active_record_helper_test.rb b/actionpack/test/template/active_record_helper_test.rb
index c1bbdae8fb645e93f61053625649b0ddec20c457..b07ce6cf5d1e578d14ee6ee4356d8c36c2f99ce2 100644
--- a/actionpack/test/template/active_record_helper_test.rb
+++ b/actionpack/test/template/active_record_helper_test.rb
@@ -5,15 +5,18 @@ class ActiveRecordHelperTest < ActionView::TestCase
 
   silence_warnings do
     class Post < Struct.new(:title, :author_name, :body, :secret, :written_on)
-      extend ActiveModel::APICompliant
+      extend ActiveModel::Naming
+      include ActiveModel::Conversion
     end
 
     class User < Struct.new(:email)
-      extend ActiveModel::APICompliant
+      extend ActiveModel::Naming
+      include ActiveModel::Conversion
     end
 
     class Column < Struct.new(:type, :name, :human_name)
-      extend ActiveModel::APICompliant
+      extend ActiveModel::Naming
+      include ActiveModel::Conversion
     end
   end
 
diff --git a/actionpack/test/template/atom_feed_helper_test.rb b/actionpack/test/template/atom_feed_helper_test.rb
index 89ff01ab0e75991621f8a09da5742fafb4628489..3acaecd1429089f323c6106b23c04bb2845838a7 100644
--- a/actionpack/test/template/atom_feed_helper_test.rb
+++ b/actionpack/test/template/atom_feed_helper_test.rb
@@ -1,7 +1,8 @@
 require 'abstract_unit'
 
 class Scroll < Struct.new(:id, :to_param, :title, :body, :updated_at, :created_at)
-  extend ActiveModel::APICompliant
+  extend ActiveModel::Naming
+  include ActiveModel::Conversion
 
   def new_record?
     true
diff --git a/actionpack/test/template/form_helper_test.rb b/actionpack/test/template/form_helper_test.rb
index 883afd985b1e4153eb1896045895b5a19f902975..99160dd8b1ffb867ea8a55d4d91c10a4538ee603 100644
--- a/actionpack/test/template/form_helper_test.rb
+++ b/actionpack/test/template/form_helper_test.rb
@@ -2,7 +2,8 @@
 
 silence_warnings do
   class Post < Struct.new(:title, :author_name, :body, :secret, :written_on, :cost)
-    extend ActiveModel::APICompliant
+    extend ActiveModel::Naming
+    include ActiveModel::Conversion
 
     alias_method :secret?, :secret
 
@@ -25,7 +26,8 @@ def tags_attributes=(attributes); end
   end
 
   class Comment
-    extend ActiveModel::APICompliant
+    extend ActiveModel::Naming
+    include ActiveModel::Conversion
 
     attr_reader :id
     attr_reader :post_id
@@ -43,7 +45,8 @@ def relevances_attributes=(attributes); end
   end
 
   class Tag
-    extend ActiveModel::APICompliant
+    extend ActiveModel::Naming
+    include ActiveModel::Conversion
 
     attr_reader :id
     attr_reader :post_id
@@ -61,7 +64,8 @@ def relevances_attributes=(attributes); end
   end
 
   class CommentRelevance
-    extend ActiveModel::APICompliant
+    extend ActiveModel::Naming
+    include ActiveModel::Conversion
 
     attr_reader :id
     attr_reader :comment_id
@@ -75,7 +79,8 @@ def value
   end
 
   class TagRelevance
-    extend ActiveModel::APICompliant
+    extend ActiveModel::Naming
+    include ActiveModel::Conversion
 
     attr_reader :id
     attr_reader :tag_id
diff --git a/actionpack/test/template/prototype_helper_test.rb b/actionpack/test/template/prototype_helper_test.rb
index 301a110076379ebf48da1add7826ed4f37a5813a..acbf31121281661b6deb1e180fc7a767e769fdda 100644
--- a/actionpack/test/template/prototype_helper_test.rb
+++ b/actionpack/test/template/prototype_helper_test.rb
@@ -1,11 +1,14 @@
 require 'abstract_unit'
 require 'active_model'
 
-Bunny = Struct.new(:Bunny, :id)
-Bunny.extend ActiveModel::APICompliant
+class Bunny < Struct.new(:Bunny, :id)
+  extend ActiveModel::Naming
+  include ActiveModel::Conversion
+end
 
 class Author
-  extend ActiveModel::APICompliant
+  extend ActiveModel::Naming
+  include ActiveModel::Conversion
 
   attr_reader :id
   def save; @id = 1 end
@@ -16,7 +19,8 @@ def name
 end
 
 class Article
-  extend ActiveModel::APICompliant
+  extend ActiveModel::Naming
+  include ActiveModel::Conversion
   attr_reader :id
   attr_reader :author_id
   def save; @id = 1; @author_id = 1 end
diff --git a/actionpack/test/template/record_tag_helper_test.rb b/actionpack/test/template/record_tag_helper_test.rb
index bae26f555d25e010af9b87975acb77a571f2c598..4144fea678efb8b8157b903af05b4c9f00546430 100644
--- a/actionpack/test/template/record_tag_helper_test.rb
+++ b/actionpack/test/template/record_tag_helper_test.rb
@@ -1,7 +1,8 @@
 require 'abstract_unit'
 
 class Post
-  extend ActiveModel::APICompliant
+  extend ActiveModel::Naming
+  include ActiveModel::Conversion
   def id
      45
   end
diff --git a/actionpack/test/template/test_test.rb b/actionpack/test/template/test_test.rb
index 98307fbae4dda34f60f95739c32aff60c2e96311..f32d0b3d4285fe5133fac1473f2ea353ae36e8f2 100644
--- a/actionpack/test/template/test_test.rb
+++ b/actionpack/test/template/test_test.rb
@@ -41,7 +41,7 @@ def test_homepage_url
 
   def test_link_to_person
     person = mock(:name => "David")
-    person.class.extend ActiveModel::APICompliant
+    person.class.extend ActiveModel::Naming
     expects(:mocha_mock_path).with(person).returns("/people/1")
     assert_equal '<a href="/people/1">David</a>', link_to_person(person)
   end
diff --git a/actionpack/test/template/url_helper_test.rb b/actionpack/test/template/url_helper_test.rb
index 45696895349c7aa4b23a06d28d8a898c5a6431a8..9eeb26831c11db9628f527db16b4b4ef5b0cc2dc 100644
--- a/actionpack/test/template/url_helper_test.rb
+++ b/actionpack/test/template/url_helper_test.rb
@@ -494,7 +494,8 @@ def with_restful_routing
 end
 
 class Workshop
-  extend ActiveModel::APICompliant
+  extend ActiveModel::Naming
+  include ActiveModel::Conversion
   attr_accessor :id, :new_record
 
   def initialize(id, new_record)
@@ -511,7 +512,8 @@ def to_s
 end
 
 class Session
-  extend ActiveModel::APICompliant
+  extend ActiveModel::Naming
+  include ActiveModel::Conversion
   attr_accessor :id, :workshop_id, :new_record
 
   def initialize(id, new_record)
diff --git a/activemodel/lib/active_model.rb b/activemodel/lib/active_model.rb
index 0665cfbae55c32d083cef053554cc9b979ff9558..2de19597b1d14a34d68d07f7b33f91682e54f19b 100644
--- a/activemodel/lib/active_model.rb
+++ b/activemodel/lib/active_model.rb
@@ -26,7 +26,7 @@
 require 'active_support'
 
 module ActiveModel
-  autoload :APICompliant, 'active_model/api_compliant'
+  autoload :Conversion, 'active_model/conversion'
   autoload :DeprecatedErrorMethods, 'active_model/deprecated_error_methods'
   autoload :Errors, 'active_model/errors'
   autoload :Name, 'active_model/naming'
diff --git a/activemodel/lib/active_model/api_compliant.rb b/activemodel/lib/active_model/api_compliant.rb
deleted file mode 100644
index 26f83feb6b5c7c8da1a1635d193b43494f34a38f..0000000000000000000000000000000000000000
--- a/activemodel/lib/active_model/api_compliant.rb
+++ /dev/null
@@ -1,25 +0,0 @@
-module ActiveModel
-  module APICompliant
-    include Naming
-
-    def self.extended(klass)
-      klass.class_eval do
-        include Validations
-        include InstanceMethods
-      end
-    end
-  
-    module InstanceMethods
-      def to_model
-        if respond_to?(:new_record?)
-          self.class.class_eval { def to_model() self end }
-          to_model
-        else
-          raise "In order to be ActiveModel API compliant, you need to define " \
-                "a new_record? method, which should return true if it has not " \
-                "yet been persisted."
-        end
-      end
-    end
-  end
-end
\ No newline at end of file
diff --git a/activemodel/lib/active_model/conversion.rb b/activemodel/lib/active_model/conversion.rb
new file mode 100644
index 0000000000000000000000000000000000000000..d5c65920f65da53873c0f9f4912f988deb7a9680
--- /dev/null
+++ b/activemodel/lib/active_model/conversion.rb
@@ -0,0 +1,8 @@
+module ActiveModel
+  # Include ActiveModel::Conversion if your object "acts like an ActiveModel model".
+  module Conversion
+    def to_model
+      self
+    end
+  end
+end
diff --git a/activerecord/lib/active_record/base.rb b/activerecord/lib/active_record/base.rb
index f32857afa3839bedb7f509628f4b94a791a043aa..62e97158ec645be89759859574e2614290d64e4a 100755
--- a/activerecord/lib/active_record/base.rb
+++ b/activerecord/lib/active_record/base.rb
@@ -2511,13 +2511,6 @@ def to_param
         (id = self.id) ? id.to_s : nil # Be sure to stringify the id for routes
       end
 
-      # Returns the ActiveRecord object when asked for its
-      # ActiveModel-compliant representation, because ActiveRecord is
-      # ActiveModel-compliant.
-      def to_model
-        self
-      end
-
       # Returns a cache key that can be used to identify this record.
       #
       # ==== Examples
@@ -3186,6 +3179,7 @@ def clone_attribute_value(reader_method, attribute_name)
     include Dirty
     include Callbacks, ActiveModel::Observing, Timestamp
     include Associations, AssociationPreload, NamedScope
+    include ActiveModel::Conversion
 
     # AutosaveAssociation needs to be included before Transactions, because we want
     # #save_with_autosave_associations to be wrapped inside a transaction.