diff --git a/readthedocs/examples/projects-using-telethon.rst b/readthedocs/examples/projects-using-telethon.rst
index 7ba4f998..481fa54b 100644
--- a/readthedocs/examples/projects-using-telethon.rst
+++ b/readthedocs/examples/projects-using-telethon.rst
@@ -96,3 +96,11 @@ a new ``Filter`` to define handlers more conveniently and utilities to
 run code on start and finish of the client. Be sure to check the project
 to learn about its latest features, since this description may be out of
 date.
+
+telethon-secret-chat
+====================
+
+`telethon-secret-chat <https://github.com/painor/telethon-secret-chat>`_ /
+`painor's GitHub <https://github.com/painor>`_
+
+This add-on can be used to work with secret chats in Telethon!
diff --git a/telethon/events/callbackquery.py b/telethon/events/callbackquery.py
index 5a6e1370..c35e348b 100644
--- a/telethon/events/callbackquery.py
+++ b/telethon/events/callbackquery.py
@@ -51,7 +51,7 @@ class CallbackQuery(EventBuilder):
             # Send a message with buttons users can click
             async def main():
                 await client.send_message(user, 'Yes or no?', buttons=[
-                    Button.inline('Yes!', b'yes')
+                    Button.inline('Yes!', b'yes'),
                     Button.inline('Nope', b'no')
                 ])
     """