diff --git a/lib/action_access/controller_additions.rb b/lib/action_access/controller_additions.rb
index ba58951..ec5869c 100644
--- a/lib/action_access/controller_additions.rb
+++ b/lib/action_access/controller_additions.rb
@@ -48,7 +48,7 @@ def let(*clearance_levels, permissions)
 
     def self.included(base)
       base.extend ClassMethods
-      base.helper_method :keeper
+      base.helper_method :keeper if base.respond_to? :helper_method
     end