diff --git a/src/query/src/qUtil.c b/src/query/src/qUtil.c
index 22bdefd59ef8844a560bb2944f8e61ad15f5f27f..b4433e21a3f7a9bde3a5258c60be0da0bf31a052 100644
--- a/src/query/src/qUtil.c
+++ b/src/query/src/qUtil.c
@@ -205,7 +205,7 @@ SResultRowPool* initResultRowPool(size_t size) {
     qError("ResultRow blockSize is too large:%" PRId64, tmp);
     tmp = 128*1024*1024;
   }
-  p->blockSize = tmp;
+  p->blockSize = (int32_t)tmp;
   p->position.pos = 0;
 
   p->pData = taosArrayInit(8, POINTER_BYTES);