diff --git a/telethon/client/uploads.py b/telethon/client/uploads.py
index 091e8d15..afb1f2c2 100644
--- a/telethon/client/uploads.py
+++ b/telethon/client/uploads.py
@@ -516,7 +516,7 @@ class UploadMethods:
                 ))
 
                 fm = utils.get_input_media(r.photo)
-            elif isinstance(fm, types.InputMediaUploadedDocument):
+            elif isinstance(fm, (types.InputMediaUploadedDocument, types.InputMediaDocumentExternal)):
                 r = await self(functions.messages.UploadMediaRequest(
                     entity, media=fm
                 ))