diff --git a/Providers/FreeSql.Provider.Firebird/FirebirdDbFirst.cs b/Providers/FreeSql.Provider.Firebird/FirebirdDbFirst.cs
index 1b69693b5..e05daa38c 100644
--- a/Providers/FreeSql.Provider.Firebird/FirebirdDbFirst.cs
+++ b/Providers/FreeSql.Provider.Firebird/FirebirdDbFirst.cs
@@ -125,7 +125,6 @@ public List<DbTableInfo> GetTables(string[] database, string tablename, bool ign
 
             var sql = @"
 select
-rdb$system_flag,
 trim(rdb$relation_name) as id,
 trim(rdb$owner_name) as owner,
 trim(rdb$relation_name) as name,