diff --git a/source/util/src/terror.c b/source/util/src/terror.c
index 6f726c7eff..712c413e7c 100644
--- a/source/util/src/terror.c
+++ b/source/util/src/terror.c
@@ -372,7 +372,7 @@ TAOS_DEFINE_ERROR(TSDB_CODE_QRY_EXCEED_TAGS_LIMIT,        "Tag conditon too many
 TAOS_DEFINE_ERROR(TSDB_CODE_QRY_NOT_READY,                "Query not ready")
 TAOS_DEFINE_ERROR(TSDB_CODE_QRY_HAS_RSP,                  "Query should response")
 TAOS_DEFINE_ERROR(TSDB_CODE_QRY_IN_EXEC,                  "Multiple retrieval of this query")
-TAOS_DEFINE_ERROR(TSDB_CODE_QRY_TOO_MANY_TIMEWINDOW,      "Too many time window in query")
+TAOS_DEFINE_ERROR(TSDB_CODE_QRY_TOO_MANY_TIMEWINDOW,      "Too many groups/time window in query")
 TAOS_DEFINE_ERROR(TSDB_CODE_QRY_NOT_ENOUGH_BUFFER,        "Query buffer limit has reached")
 TAOS_DEFINE_ERROR(TSDB_CODE_QRY_INCONSISTAN,              "File inconsistance in replica")
 TAOS_DEFINE_ERROR(TSDB_CODE_QRY_SYS_ERROR,                "System error")