diff --git a/XCode/DataAccessLayer/Database/PostgreSQL.cs b/XCode/DataAccessLayer/Database/PostgreSQL.cs
index 2b76de475..8687dc6ed 100644
--- a/XCode/DataAccessLayer/Database/PostgreSQL.cs
+++ b/XCode/DataAccessLayer/Database/PostgreSQL.cs
@@ -202,6 +202,9 @@ private string ValueToSQL(Type? type, bool isNullable, object? value)
     /// <summary>系统数据库名</summary>
     public override String SystemDatabaseName => "postgres";
 
+    /// <inheritdoc/>
+    public override NameFormats DefaultNameFormat => NameFormats.Underline;
+
     /// <summary>字符串相加</summary>
     /// <param name="left"></param>
     /// <param name="right"></param>