diff --git a/problems/0707.设计链表.md b/problems/0707.设计链表.md
index 86f3a683..c5a55574 100644
--- a/problems/0707.设计链表.md
+++ b/problems/0707.设计链表.md
@@ -973,6 +973,9 @@ class MyLinkedList {
         // 处理头节点
         if (index === 0) {
             this.head = this.head!.next;
+            if (index === this.size - 1) {
+                this.tail = null
+            }
             this.size--;
             return;
         }