From 49492b0efcb2b4c70a8c47ea29059a81683cca01 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Sebasti=C3=A1n=20Ram=C3=ADrez?= <tiangolo@gmail.com>
Date: Wed, 8 Oct 2025 19:14:06 +0200
Subject: [PATCH] =?UTF-8?q?=F0=9F=8E=A8=20Tweak=20types=20for=20Python=203?=
 =?UTF-8?q?.9=20and=20below?=
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---
 fastapi/utils.py | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/fastapi/utils.py b/fastapi/utils.py
index 0d8e16ad8..f8375bc8e 100644
--- a/fastapi/utils.py
+++ b/fastapi/utils.py
@@ -79,7 +79,7 @@ def create_model_field(
     class_validators: Optional[Dict[str, Validator]] = None,
     default: Optional[Any] = Undefined,
     required: Union[bool, UndefinedType] = Undefined,
-    model_config: Type[BaseConfig] | None = None,
+    model_config: Union[Type[BaseConfig], None] = None,
     field_info: Optional[FieldInfo] = None,
     alias: Optional[str] = None,
     mode: Literal["validation", "serialization"] = "validation",