diff --git a/activesupport/lib/active_support/core_ext/proc.rb b/activesupport/lib/active_support/core_ext/proc.rb
index 71b413a88a8b04278a279ce78f121ee00055cae4..94bb5fb0cb7fa256e4761c572ebd88e43d218dbd 100644
--- a/activesupport/lib/active_support/core_ext/proc.rb
+++ b/activesupport/lib/active_support/core_ext/proc.rb
@@ -1,4 +1,4 @@
-require "active_support/core_ext/object"
+require "active_support/core_ext/kernel/singleton_class"
 
 class Proc #:nodoc:
   def bind(object)