diff --git a/1-js/06-advanced-functions/01-recursion/article.md b/1-js/06-advanced-functions/01-recursion/article.md
index 5ae8944742..ddb9fce19e 100644
--- a/1-js/06-advanced-functions/01-recursion/article.md
+++ b/1-js/06-advanced-functions/01-recursion/article.md
@@ -488,6 +488,7 @@ let list = { value: 1 };
 list.next = { value: 2 };
 list.next.next = { value: 3 };
 list.next.next.next = { value: 4 };
+list.next.next.next.next = null;
 
 *!*
 // prepend the new value to the list