diff --git a/include/common/tmsgdef.h b/include/common/tmsgdef.h
index 3be49361d2..323b2de6ba 100644
--- a/include/common/tmsgdef.h
+++ b/include/common/tmsgdef.h
@@ -65,7 +65,7 @@ enum {
 #define TD_NEW_MSG_SEG(TYPE) TYPE = ((TYPE##_SEG_CODE) << 8),
 #define TD_DEF_MSG_TYPE(TYPE, MSG, REQ, RSP) TYPE, TYPE##_RSP,
 
-enum {
+enum { // WARN: new msg should be appended to segment tail
 #endif
   TD_NEW_MSG_SEG(TDMT_DND_MSG)
   TD_DEF_MSG_TYPE(TDMT_DND_CREATE_MNODE, "dnode-create-mnode", NULL, NULL)
@@ -156,7 +156,6 @@ enum {
   TD_DEF_MSG_TYPE(TDMT_MND_TELEM_TIMER, "telem-tmr", SMTimerReq, SMTimerReq)
   TD_DEF_MSG_TYPE(TDMT_MND_TRANS_TIMER, "trans-tmr", NULL, NULL)
   TD_DEF_MSG_TYPE(TDMT_MND_TTL_TIMER, "ttl-tmr", NULL, NULL)
-  TD_DEF_MSG_TYPE(TDMT_MND_TRIM_DB_TIMER, "trim-db-tmr", NULL, NULL)
   TD_DEF_MSG_TYPE(TDMT_MND_GRANT_HB_TIMER, "grant-hb-tmr", NULL, NULL)
   TD_DEF_MSG_TYPE(TDMT_MND_KILL_TRANS, "kill-trans", NULL, NULL)
   TD_DEF_MSG_TYPE(TDMT_MND_KILL_QUERY, "kill-query", NULL, NULL)
@@ -183,6 +182,7 @@ enum {
   TD_DEF_MSG_TYPE(TDMT_MND_RESTORE_DNODE, "restore-dnode", NULL, NULL)
   TD_DEF_MSG_TYPE(TDMT_MND_PAUSE_STREAM, "pause-stream", NULL, NULL)
   TD_DEF_MSG_TYPE(TDMT_MND_RESUME_STREAM, "resume-stream", NULL, NULL)
+  TD_DEF_MSG_TYPE(TDMT_MND_TRIM_DB_TIMER, "trim-db-tmr", NULL, NULL)
 
   TD_NEW_MSG_SEG(TDMT_VND_MSG)
   TD_DEF_MSG_TYPE(TDMT_VND_SUBMIT, "submit", SSubmitReq, SSubmitRsp)