diff --git a/app/helpers/exercise_helper.rb b/app/helpers/exercise_helper.rb
index cab90c21..7dcbb6f4 100644
--- a/app/helpers/exercise_helper.rb
+++ b/app/helpers/exercise_helper.rb
@@ -13,6 +13,8 @@ module ExerciseHelper
 
     if enabled
       config.read[:code_pilot][:url]
+    else
+      return nil
     end
   end
 end