diff --git a/problems/0203.移除链表元素.md b/problems/0203.移除链表元素.md
index 4e7bdd34..c0e0be3e 100644
--- a/problems/0203.移除链表元素.md
+++ b/problems/0203.移除链表元素.md
@@ -324,7 +324,7 @@ function removeElements(head: ListNode | null, val: number): ListNode | null {
         head = head.next;
     }
     if (head === null) return head;
-    let pre: ListNode = head, cur: ListNode = head.next;
+    let pre: ListNode = head, cur: ListNode | null = head.next;
     // 删除非头部节点
     while (cur) {
         if (cur.val === val) {