diff --git a/src/client/src/tscServer.c b/src/client/src/tscServer.c
index 641a5a90736e8604cdd15de609ed33d51e326fac..9c52a55e1ccae6be99a28d2a8a2bd85e4c7b1222 100644
--- a/src/client/src/tscServer.c
+++ b/src/client/src/tscServer.c
@@ -131,6 +131,7 @@ void tscProcessActivityTimer(void *handle, void *tmrId) {
       return;
     }
 
+    pSql->cmd.command = TSDB_SQL_HB;
     pSql->param = pObj;
     pSql->pTscObj = pObj;
     pSql->signature = pSql;