diff --git a/activesupport/lib/active_support/fork_tracker.rb b/activesupport/lib/active_support/fork_tracker.rb
index b7c3f30d35..2020f79c2d 100644
--- a/activesupport/lib/active_support/fork_tracker.rb
+++ b/activesupport/lib/active_support/fork_tracker.rb
@@ -20,7 +20,11 @@ module ActiveSupport
 
     module CoreExtPrivate
       include CoreExt
-      private :fork
+
+      private
+        def fork(*)
+          super
+        end
     end
 
     @pid = Process.pid