diff --git a/pyrogram/client/message_parser.py b/pyrogram/client/message_parser.py
index 85266bff..4ae4180e 100644
--- a/pyrogram/client/message_parser.py
+++ b/pyrogram/client/message_parser.py
@@ -266,8 +266,8 @@ def parse_message(
             contact = pyrogram.Contact(
                 phone_number=media.phone_number,
                 first_name=media.first_name,
-                last_name=media.last_name,
-                user_id=media.user_id
+                last_name=media.last_name or None,
+                user_id=media.user_id or None
             )
         elif isinstance(media, types.MessageMediaVenue):
             venue = pyrogram.Venue(