diff --git a/problems/0019.删除链表的倒数第N个节点.md b/problems/0019.删除链表的倒数第N个节点.md
index f508b523..2fcfd283 100644
--- a/problems/0019.删除链表的倒数第N个节点.md
+++ b/problems/0019.删除链表的倒数第N个节点.md
@@ -82,7 +82,7 @@ public:
         
         // ListNode *tmp = slow->next;  C++释放内存的逻辑
         // slow->next = tmp->next;
-        // delete nth;
+        // delete tmp;
         
         return dummyHead->next;
     }