Add remaining types to IndexFile ._preprocess_add_items() to .diff()

1 files changed, 2 insertions, 2 deletions

diff --git a/git/index/fun.py b/git/index/fun.py
index 466d323c..cc43f0a4 100644
--- a/git/index/fun.py
+++ b/git/index/fun.py
@@ -13,7 +13,7 @@ from stat import (
     S_IFREG,
 )
 import subprocess
-from typing import List, Tuple, cast
+from typing import List, Tuple, Union, cast
 
 from git.cmd import PROC_CREATIONFLAGS, handle_process_output
 from git.compat import (
@@ -168,7 +168,7 @@ def read_header(stream):
     return version, num_entries
 
 
-def entry_key(*entry) -> Tuple[PathLike, int]:
+def entry_key(*entry: Union[BaseIndexEntry, PathLike, int]) -> Tuple[PathLike, int]:
     """:return: Key suitable to be used for the index.entries dictionary
     :param entry: One instance of type BaseIndexEntry or the path and the stage"""
     if len(entry) == 1: