diff --git a/problems/0617.合并二叉树.md b/problems/0617.合并二叉树.md
index db2d3762..72353b29 100644
--- a/problems/0617.合并二叉树.md
+++ b/problems/0617.合并二叉树.md
@@ -341,7 +341,7 @@ class Solution {
             if (node1.left == null && node2.left != null) {
                 node1.left = node2.left;
             }
-            // 若node2的左节点为空，直接赋值
+            // 若node1的右节点为空，直接赋值
             if (node1.right == null && node2.right != null) {
                 node1.right = node2.right;
             }
@@ -696,3 +696,4 @@ object Solution {
 <a href="https://programmercarl.com/other/kstar.html" target="_blank">
   <img src="../pics/网站星球宣传海报.jpg" width="1000"/>
 </a>
+