diff --git a/telethon/client/uploads.py b/telethon/client/uploads.py
index 6b133053..bebeec46 100644
--- a/telethon/client/uploads.py
+++ b/telethon/client/uploads.py
@@ -5,6 +5,7 @@ import os
 import pathlib
 import re
 import typing
+import inspect
 from io import BytesIO
 
 from .. import utils, helpers, hints