diff --git a/src/client/src/tscUtil.c b/src/client/src/tscUtil.c
index 6a75ff5f091f789aa50369e4f1c30647013a5933..2bd601d812294ea311e30fece732d1e1c2c533ec 100644
--- a/src/client/src/tscUtil.c
+++ b/src/client/src/tscUtil.c
@@ -2085,7 +2085,7 @@ int32_t tscAllocPayloadFast(SSqlCmd *pCmd, size_t size) {
     assert(pCmd->allocSize == 0);
 
     pCmd->payload = malloc(size);
-    pCmd->allocSize = size;
+    pCmd->allocSize = (uint32_t) size;
   } else if (pCmd->allocSize < size) {
     char* tmp = realloc(pCmd->payload, size);
     if (tmp == NULL) {
@@ -2093,7 +2093,7 @@ int32_t tscAllocPayloadFast(SSqlCmd *pCmd, size_t size) {
     }
 
     pCmd->payload = tmp;
-    pCmd->allocSize = size;
+    pCmd->allocSize = (uint32_t) size;
   }
 
   assert(pCmd->allocSize >= size);