diff --git a/source/libs/executor/src/eventwindowoperator.c b/source/libs/executor/src/eventwindowoperator.c
index b5dea6d94d..f7dddf6b29 100644
--- a/source/libs/executor/src/eventwindowoperator.c
+++ b/source/libs/executor/src/eventwindowoperator.c
@@ -174,6 +174,7 @@ void destroyEWindowOperatorInfo(void* param) {
   colDataDestroy(&pInfo->twAggSup.timeWindowData);
 
   cleanupAggSup(&pInfo->aggSup);
+  cleanupExprSupp(&pInfo->scalarSup);
   taosMemoryFreeClear(param);
 }