diff --git a/actionpack/lib/action_controller/metal/request_forgery_protection.rb b/actionpack/lib/action_controller/metal/request_forgery_protection.rb
index 2826b1e34c51c..f1fb4d7ce5396 100644
--- a/actionpack/lib/action_controller/metal/request_forgery_protection.rb
+++ b/actionpack/lib/action_controller/metal/request_forgery_protection.rb
@@ -13,7 +13,7 @@ module RequestForgeryProtection
       cattr_accessor :request_forgery_protection_token
 
       # Controls whether request forgergy protection is turned on or not. Turned off by default only in test mode.
-      class_inheritable_accessor :allow_forgery_protection
+      extlib_inheritable_accessor :allow_forgery_protection
       self.allow_forgery_protection = true
 
       helper_method :form_authenticity_token