diff --git a/django-stubs/contrib/admin/options.pyi b/django-stubs/contrib/admin/options.pyi
index 892b91cb..3a5ca8ab 100644
--- a/django-stubs/contrib/admin/options.pyi
+++ b/django-stubs/contrib/admin/options.pyi
@@ -139,7 +139,7 @@ class BaseModelAdmin(Generic[_ModelT]):
     def has_view_or_change_permission(self, request: HttpRequest, obj: _ModelT | None = ...) -> bool: ...
     def has_module_permission(self, request: HttpRequest) -> bool: ...
     @property
-    def view_on_site(self) -> Callable[[_ModelT], str] | bool: ...
+    def view_on_site(self) -> Callable[[_ModelT], str | None] | bool: ...
 
 _ModelAdmin = TypeVar("_ModelAdmin", bound=ModelAdmin[Any])
 _ActionCallable: TypeAlias = Callable[[_ModelAdmin, HttpRequest, QuerySet[_ModelT]], HttpResponseBase | None]