diff --git a/problems/0047.全排列II.md b/problems/0047.全排列II.md
index 94bb4df1..d22e441e 100644
--- a/problems/0047.全排列II.md
+++ b/problems/0047.全排列II.md
@@ -85,7 +85,7 @@ public:
         path.clear();
         sort(nums.begin(), nums.end()); // 排序
         vector<bool> used(nums.size(), false);
-        backtracking(nums, vec, used);
+        backtracking(nums, used);
         return result;
     }
 };