diff --git a/discord/app_commands/models.py b/discord/app_commands/models.py
index 26dc58688..ba7e44095 100644
--- a/discord/app_commands/models.py
+++ b/discord/app_commands/models.py
@@ -82,7 +82,7 @@ class AllChannels:
         The guild the application command permission is for.
     """
 
-    __slots__ = 'guild'
+    __slots__ = ('guild',)
 
     def __init__(self, guild: Guild):
         self.guild = guild