diff --git a/src/benchTmq.c b/src/benchTmq.c
index 77af2fc9..f93e2fe4 100644
--- a/src/benchTmq.c
+++ b/src/benchTmq.c
@@ -78,6 +78,7 @@ static int create_topic() {
         }
 
         infoPrint("successfully create topic: %s\n", pConsumerInfo->topicName[i]);
+        taos_free_result(res);
     }
     closeBenchConn(conn);
     return 0;