1 files changed, 9 insertions, 1 deletions
diff --git a/activesupport/lib/active_support/concern.rb b/activesupport/lib/active_support/concern.rb
index b796d01dfd..9d5cee54e3 100644
--- a/activesupport/lib/active_support/concern.rb
+++ b/activesupport/lib/active_support/concern.rb
@@ -26,7 +26,7 @@ module ActiveSupport
   #       scope :disabled, -> { where(disabled: true) }
   #     end
   #
-  #     module ClassMethods
+  #     class_methods do
   #       ...
   #     end
   #   end
@@ -130,5 +130,13 @@ module ActiveSupport
         super
       end
     end
+
+    def class_methods(&class_methods_module_definition)
+      mod = const_defined?(:ClassMethods) ?
+        const_get(:ClassMethods) :
+        const_set(:ClassMethods, Module.new)
+
+      mod.module_eval(&class_methods_module_definition)
+    end
   end
 end