diff --git a/1-js/04-object-basics/01-object/article.md b/1-js/04-object-basics/01-object/article.md
index 946f3cba..120e8dde 100644
--- a/1-js/04-object-basics/01-object/article.md
+++ b/1-js/04-object-basics/01-object/article.md
@@ -154,7 +154,7 @@ let user = {
 };
 
 let key = "name";
-user.key // undefined
+alert( user.key ) // undefined
 ```
 
 ### Computed properties