diff --git a/problems/0024.两两交换链表中的节点.md b/problems/0024.两两交换链表中的节点.md
index 57034f47..405f4183 100644
--- a/problems/0024.两两交换链表中的节点.md
+++ b/problems/0024.两两交换链表中的节点.md
@@ -63,7 +63,9 @@ public:
 
             cur = cur->next->next; // cur移动两位，准备下一轮交换
         }
-        return dummyHead->next;
+        ListNode* result = dummyHead->next;
+        delete dummyHead;
+        return result;
     }
 };
 ```