1 files changed, 2 insertions, 0 deletions
diff --git a/activesupport/lib/active_support/core_ext/class/delegating_attributes.rb b/activesupport/lib/active_support/core_ext/class/delegating_attributes.rb
index b5785bdcd3..df4954e67a 100644
--- a/activesupport/lib/active_support/core_ext/class/delegating_attributes.rb
+++ b/activesupport/lib/active_support/core_ext/class/delegating_attributes.rb
@@ -27,7 +27,9 @@ private
   # inheritance behavior, without having to store the object in an instance
   # variable and look up the superclass chain manually.
   def _stash_object_in_method(object, method, instance_reader = true)
+    singleton_class.send(:remove_possible_method, method)
     singleton_class.send(:define_method, method) { object }
+    remove_possible_method(method)
     define_method(method) { object } if instance_reader
   end