diff --git a/source/libs/stream/src/streamSessionState.c b/source/libs/stream/src/streamSessionState.c
index 8aedc41625..fbf4b2693c 100644
--- a/source/libs/stream/src/streamSessionState.c
+++ b/source/libs/stream/src/streamSessionState.c
@@ -124,6 +124,7 @@ int32_t getSessionWinResultBuff(SStreamFileState* pFileState, SSessionKey* pKey,
     } else {
       (*pVal) = addNewSessionWindow(pFileState, pWinStates, pKey);
       code = TSDB_CODE_FAILED;
+      taosMemoryFree(p);
     }
     goto _end;
   }