diff --git a/telethon/client/uploads.py b/telethon/client/uploads.py
index 25c80808..a6879914 100644
--- a/telethon/client/uploads.py
+++ b/telethon/client/uploads.py
@@ -393,6 +393,8 @@ class UploadMethods:
                 r = await self(functions.messages.UploadMediaRequest(
                     entity, media=fm
                 ))
+                self.session.cache_file(
+                    fh.md5, fh.size, utils.get_input_document(r.document))
 
                 fm = utils.get_input_media(
                     r.document, supports_streaming=supports_streaming)