diff --git a/source/libs/stream/src/streamState.c b/source/libs/stream/src/streamState.c
index 0374e22a4a69e07d75406ac4343aa0a8ee21ff51..ea31347db5a9470b56e3356455e5308c140781f8 100644
--- a/source/libs/stream/src/streamState.c
+++ b/source/libs/stream/src/streamState.c
@@ -411,6 +411,7 @@ int32_t streamStateGetFirst(SStreamState* pState, SWinKey* key) {
   streamStatePut(pState, &tmp, NULL, 0);
   SStreamStateCur* pCur = streamStateSeekKeyNext(pState, &tmp);
   int32_t          code = streamStateGetKVByCur(pCur, key, NULL, 0);
+  streamStateFreeCur(pCur);
   streamStateDel(pState, &tmp);
   return code;
 }