diff --git a/problems/0239.滑动窗口最大值.md b/problems/0239.滑动窗口最大值.md
index be46bd05..21dbaf4d 100644
--- a/problems/0239.滑动窗口最大值.md
+++ b/problems/0239.滑动窗口最大值.md
@@ -410,7 +410,7 @@ var maxSlidingWindow = function (nums, k) {
     // 入队当前元素下标
     q.push(i);
     // 判断当前最大值（即队首元素）是否在窗口中，若不在便将其出队
-    while (q[0] <= i - k) {
+    if (q[0] <= i - k) {
       q.shift();
     }
     // 当达到窗口大小时便开始向结果中添加数据