diff --git a/src/inc/taosmsg.h b/src/inc/taosmsg.h
index b81bc72652d5e886eb18833c6ba4a3cbc35ef750..3cc95145754149ba36e4fe3733d3ce35482f86e5 100644
--- a/src/inc/taosmsg.h
+++ b/src/inc/taosmsg.h
@@ -501,8 +501,7 @@ typedef struct {
 } SVnodeLoad;
 
 typedef struct {
-  char     acct[TSDB_USER_LEN];
-  char     db[TSDB_DB_NAME_LEN];
+  char     db[TSDB_USERID_LEN + TSDB_DB_NAME_LEN];
   int32_t  cacheBlockSize; //MB
   int32_t  totalBlocks;
   int32_t  maxTables;
diff --git a/src/mnode/inc/mnodeDef.h b/src/mnode/inc/mnodeDef.h
index 51785ea61e81bbcd7639865c2fce7358dd216073..f33a2664b57252522d5032c2e84332a70c48196e 100644
--- a/src/mnode/inc/mnodeDef.h
+++ b/src/mnode/inc/mnodeDef.h
@@ -154,7 +154,7 @@ typedef struct {
 } SDbCfg;
 
 typedef struct SDbObj {
-  char    name[TSDB_DB_NAME_LEN];
+  char    name[TSDB_USERID_LEN + TSDB_DB_NAME_LEN];
   char    acct[TSDB_USER_LEN];
   int64_t createdTime;
   int32_t cfgVersion;