diff --git a/telethon/client/uploads.py b/telethon/client/uploads.py
index dfec45a3..e2ca8951 100644
--- a/telethon/client/uploads.py
+++ b/telethon/client/uploads.py
@@ -58,10 +58,7 @@ def _resize_photo_if_needed(
         except KeyError:
             kwargs = {}
 
-        if image.width <= width and image.height <= height:
-            return file
-
-        image.thumbnail((width, height), PIL.Image.ANTIALIAS)
+        image.thumbnail((width, height), PIL.Image.LANCZOS)
 
         alpha_index = image.mode.find('A')
         if alpha_index == -1: