diff --git a/source/libs/executor/src/timewindowoperator.c b/source/libs/executor/src/timewindowoperator.c
index 6be9a0402fe246e90b9b428c057aa7c10f301b62..a0d3de5676397310434cab68fd4049d0caacc1e3 100644
--- a/source/libs/executor/src/timewindowoperator.c
+++ b/source/libs/executor/src/timewindowoperator.c
@@ -985,7 +985,8 @@ void doCloseWindow(SResultRowInfo* pResultRowInfo, const SIntervalAggOperatorInf
   // current result is done in computing final results.
   if (pInfo->timeWindowInterpo && isResultRowInterpolated(pResult, RESULT_ROW_END_INTERP)) {
     closeResultRow(pResult);
-    tdListPopHead(pResultRowInfo->openWindow);
+    SListNode *pNode = tdListPopHead(pResultRowInfo->openWindow);
+    taosMemoryFree(pNode);
   }
 }