diff --git a/django-stubs/contrib/admin/options.pyi b/django-stubs/contrib/admin/options.pyi
index bff6d7f..ca3d74c 100644
--- a/django-stubs/contrib/admin/options.pyi
+++ b/django-stubs/contrib/admin/options.pyi
@@ -171,7 +171,9 @@ class ModelAdmin(BaseModelAdmin[_ModelT]):
     def get_form(self, request: Any, obj: Optional[_ModelT] = ..., change: bool = ..., **kwargs: Any): ...
     def get_changelist(self, request: HttpRequest, **kwargs: Any) -> Type[ChangeList]: ...
     def get_changelist_instance(self, request: HttpRequest) -> ChangeList: ...
-    def get_object(self, request: HttpRequest, object_id: str, from_field: None = ...) -> Optional[_ModelT]: ...
+    def get_object(
+        self, request: HttpRequest, object_id: str, from_field: Optional[Union[Callable[..., Any], str]] = ...
+    ) -> Optional[_ModelT]: ...
     def get_changelist_form(self, request: Any, **kwargs: Any): ...
     def get_changelist_formset(self, request: Any, **kwargs: Any): ...
     def get_formsets_with_inlines(self, request: HttpRequest, obj: Optional[_ModelT] = ...) -> Iterator[Any]: ...