diff --git a/telethon/utils.py b/telethon/utils.py
index 74f7988e..d570f8cb 100644
--- a/telethon/utils.py
+++ b/telethon/utils.py
@@ -460,6 +460,7 @@ def get_input_media(
     if isinstance(media, types.MessageMediaDocument):
         return types.InputMediaDocument(
             id=get_input_document(media.document),
+            spoiler=media.spoiler,
             ttl_seconds=ttl or media.ttl_seconds
         )