diff --git a/problems/0404.左叶子之和.md b/problems/0404.左叶子之和.md
index d7fd629e..4ef68d3b 100644
--- a/problems/0404.左叶子之和.md
+++ b/problems/0404.左叶子之和.md
@@ -336,8 +336,8 @@ var sumOfLeftLeaves = function(root) {
         if(node===null){
             return 0;
         }
-        let leftValue = sumOfLeftLeaves(node.left);
-        let rightValue = sumOfLeftLeaves(node.right);
+        let leftValue = nodesSum(node.left);
+        let rightValue = nodesSum(node.right);
         // 3. 单层递归逻辑
         let midValue = 0;
         if(node.left&&node.left.left===null&&node.left.right===null){