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 dbd053d1..28bb61ee 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
@@ -110,7 +110,7 @@ public ListNode removeNthFromEnd(ListNode head, int n){
         fastIndex = fastIndex.next;
     }
 
-    while (fastIndex.next != null){
+    while (fastIndex != null){
         fastIndex = fastIndex.next;
         slowIndex = slowIndex.next;
     }