From 3e188d0344651e83ee7a73f6506d0214035cfa1f Mon Sep 17 00:00:00 2001
From: apepenkov <39992738+apepenkov@users.noreply.github.com>
Date: Sat, 3 Oct 2020 18:16:10 +0300
Subject: [PATCH] Add missing check for permissions.is_creator (#1578)

---
 telethon/tl/custom/participantpermissions.py | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/telethon/tl/custom/participantpermissions.py b/telethon/tl/custom/participantpermissions.py
index 654f32b6..3a1c098e 100644
--- a/telethon/tl/custom/participantpermissions.py
+++ b/telethon/tl/custom/participantpermissions.py
@@ -18,7 +18,10 @@ class ParticipantPermissions:
 
     @property
     def is_creator(self):
-        return isinstance(self.participant, types.ChannelParticipantCreator)
+        return isinstance(self.participant, (
+            types.ChannelParticipantCreator,
+            types.ChatParticipantCreator
+        ))
 
     @property
     def has_default_permissions(self):