diff --git a/source/libs/stream/src/streamData.c b/source/libs/stream/src/streamData.c
index b248c753af..ea3e4f5985 100644
--- a/source/libs/stream/src/streamData.c
+++ b/source/libs/stream/src/streamData.c
@@ -196,7 +196,7 @@ SStreamQueueItem* streamMergeQueueItem(SStreamQueueItem* dst, SStreamQueueItem*
     taosFreeQitem(pElem);
     return (SStreamQueueItem*)pMerged;
   } else {
-    qDebug("block type:%d not merged with existed blocks list, type:%d", streamGetBlockTypeStr(pElem->type), dst->type);
+    qDebug("block type:%s not merged with existed blocks list, type:%d", streamGetBlockTypeStr(pElem->type), dst->type);
     return NULL;
   }
 }