diff --git a/1-js/05-data-types/09-destructuring-assignment/article.md b/1-js/05-data-types/09-destructuring-assignment/article.md
index 7e39dc20..ff56c38e 100644
--- a/1-js/05-data-types/09-destructuring-assignment/article.md
+++ b/1-js/05-data-types/09-destructuring-assignment/article.md
@@ -147,6 +147,7 @@ let [firstName, surname] = [];
 */!*
 
 alert(firstName); // undefined
+alert(surname); // undefined
 ```
 
 If we want a "default" value to replace the missing one, we can provide it using `=`: