diff --git a/lib/shoulda/matchers/active_record/association_matcher.rb b/lib/shoulda/matchers/active_record/association_matcher.rb
index 5db0b4cd..9ea51950 100644
--- a/lib/shoulda/matchers/active_record/association_matcher.rb
+++ b/lib/shoulda/matchers/active_record/association_matcher.rb
@@ -1,4 +1,4 @@
-require 'forwardable'
+require 'active_support/core_ext/module/delegation'
 
 module Shoulda # :nodoc:
   module Matchers