From 7f63209acc28462bfcb009ddeb4238bd978b3a60 Mon Sep 17 00:00:00 2001
From: Mike Bayer <mike_mp@zzzcomputing.com>
Date: Sat, 27 Sep 2025 11:39:20 -0400
Subject: [PATCH] fix mypy failure

Change-Id: I33769e9ef98a0f35d7429cd63c857b98298161be
---
 alembic/ddl/mssql.py | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/alembic/ddl/mssql.py b/alembic/ddl/mssql.py
index 5376da5a..50d441f8 100644
--- a/alembic/ddl/mssql.py
+++ b/alembic/ddl/mssql.py
@@ -96,7 +96,9 @@ class MSSQLImpl(DefaultImpl):
         type_: Optional[TypeEngine] = None,
         schema: Optional[str] = None,
         existing_type: Optional[TypeEngine] = None,
-        existing_server_default: Optional[_ServerDefault] = None,
+        existing_server_default: Union[
+            _ServerDefault, Literal[False], None
+        ] = None,
         existing_nullable: Optional[bool] = None,
         **kw: Any,
     ) -> None:
-- 
2.47.3