diff --git a/source/libs/stream/src/streamDispatch.c b/source/libs/stream/src/streamDispatch.c
index bb32173404..3d21db2d79 100644
--- a/source/libs/stream/src/streamDispatch.c
+++ b/source/libs/stream/src/streamDispatch.c
@@ -766,6 +766,7 @@ int32_t streamProcessDispatchRsp(SStreamTask* pTask, SStreamDispatchRsp* pRsp, i
     }
 
     streamFreeQitem(pTask->msgInfo.pData);
+    pTask->msgInfo.pData = NULL;
     return TSDB_CODE_SUCCESS;
   }