diff --git a/telebot/__init__.py b/telebot/__init__.py
index 03910e4..75b410a 100644
--- a/telebot/__init__.py
+++ b/telebot/__init__.py
@@ -2075,7 +2075,7 @@ class TeleBot:
         :type message_thread_id: :obj:`int`
 
         :param thumb: Deprecated. Use thumbnail instead
-
+:type thumbnail: :obj:`str` or :class:`telebot.types.InputFile`
         :return: On success, the sent Message is returned.
         :rtype: :class:`telebot.types.Message`
         """