diff --git a/django-stubs/contrib/admin/sites.pyi b/django-stubs/contrib/admin/sites.pyi
index b051ef9..3c9d714 100644
--- a/django-stubs/contrib/admin/sites.pyi
+++ b/django-stubs/contrib/admin/sites.pyi
@@ -32,7 +32,7 @@ class AdminSite:
     site_header: str = ...
     index_title: str = ...
     site_url: str = ...
-    login_form: Optional[AuthenticationForm] = ...
+    login_form: Optional[Type[AuthenticationForm]] = ...
     index_template: Optional[str] = ...
     app_index_template: Optional[str] = ...
     login_template: Optional[str] = ...