diff --git a/src/mnode/src/mnodeTable.c b/src/mnode/src/mnodeTable.c
index 5837aed259..ac7d44b1a6 100644
--- a/src/mnode/src/mnodeTable.c
+++ b/src/mnode/src/mnodeTable.c
@@ -1345,7 +1345,7 @@ int32_t mnodeRetrieveShowSuperTables(SShowObj *pShow, char *data, int32_t rows,
 
     pWrite = data + pShow->offset[cols] * rows + pShow->bytes[cols] * numOfRows;
   
-    int16_t len = strnlen(stableName, TSDB_DB_NAME_LEN - 1);
+    int16_t len = strnlen(stableName, TSDB_TABLE_NAME_LEN - 1);
     *(int16_t*) pWrite = len;
     pWrite += sizeof(int16_t); // todo refactor