diff --git a/activemodel/lib/active_model/validations/clusivity.rb b/activemodel/lib/active_model/validations/clusivity.rb
index cf1415b6c2a39aa4e2d7c914119006aa078e9af9..3d7067fbcbde9872be264d511dd8e469de425d74 100644
--- a/activemodel/lib/active_model/validations/clusivity.rb
+++ b/activemodel/lib/active_model/validations/clusivity.rb
@@ -1,4 +1,4 @@
-require 'active_support/core_ext/range.rb'
+require 'active_support/core_ext/range'
 
 module ActiveModel
   module Validations