1 files changed, 6 insertions, 5 deletions
diff --git a/activesupport/lib/active_support/core_ext/object/metaclass.rb b/activesupport/lib/active_support/core_ext/object/metaclass.rb
index 93fb0ad594..4b36a243c9 100644
--- a/activesupport/lib/active_support/core_ext/object/metaclass.rb
+++ b/activesupport/lib/active_support/core_ext/object/metaclass.rb
@@ -1,13 +1,14 @@
+require 'active_support/deprecation'
+
 class Object
-  # Get object's meta (ghost, eigenclass, singleton) class
+  # Get object's meta (ghost, eigenclass, singleton) class.
+  #
+  # Deprecated in favor of Object#singleton_class.
   def metaclass
     class << self
       self
     end
   end
 
-  # If class_eval is called on an object, add those methods to its metaclass
-  def class_eval(*args, &block)
-    metaclass.class_eval(*args, &block)
-  end
+  deprecate :metaclass => :singleton_class
 end