diff --git a/src/rpc/src/trpc.c b/src/rpc/src/trpc.c
index 5071376bcd22c2afe29411b4a1ba096f520ef948..db1ca33841c502f2b983501880412d79bf02e175 100755
--- a/src/rpc/src/trpc.c
+++ b/src/rpc/src/trpc.c
@@ -328,6 +328,10 @@ int taosSendSimpleRsp(void *thandle, char rsptype, char code) {
   }
 
   pStart = taosBuildRspMsgWithSize(thandle, rsptype, 32);
+  if (pStart == NULL) {
+    tError("build rsp msg error, return null prt");
+    return -1;
+  }
   pMsg = pStart;
 
   *pMsg = code;