diff --git a/app/controllers/koudoku/subscriptions_controller.rb b/app/controllers/koudoku/subscriptions_controller.rb
index ebf4dde..88cdae1 100644
--- a/app/controllers/koudoku/subscriptions_controller.rb
+++ b/app/controllers/koudoku/subscriptions_controller.rb
@@ -53,7 +53,7 @@ def load_subscription
       @subscription = ::Subscription.where(ownership_attribute => current_owner.id).find_by_id(params[:id])
 
       # also, if cancan methods are available, we should use that to authorize.
-      if defined?(:can?)
+      if respond_to?(:can?)
         return unauthorized unless can? :manage, @subscription
       end