diff --git a/khard/contacts.py b/khard/contacts.py
index 3a720ce..d6d93ce 100644
--- a/khard/contacts.py
+++ b/khard/contacts.py
@@ -45,9 +45,8 @@ def multi_property_key(item: str) -> tuple[Literal[0], str]: ...
 @overload
 def multi_property_key(item: dict[T, Any]) -> tuple[Literal[1], T]: ...
 @overload
-def multi_property_key(item: Union[str, dict[T, Any]]) -> tuple[Union[Literal[0], Literal[1]], Union[str, T]]: ...
-def multi_property_key(item: Union[str, dict[T, Any]]
-                       ) -> tuple[int, Union[T, str]]:
+def multi_property_key(item: Union[str, dict[T, Any]]) -> tuple[Literal[0, 1], Union[T, str]]: ...
+def multi_property_key(item: Union[str, dict[T, Any]]) -> tuple[Literal[0, 1], Union[T, str]]:
     """Key function to pass to sorted(), allowing sorting of dicts with lists
     and strings. Dicts will be sorted by their label, after other types.