diff --git a/discord/abc.py b/discord/abc.py
index 4f861984d..e2da0f849 100644
--- a/discord/abc.py
+++ b/discord/abc.py
@@ -300,7 +300,7 @@ class _Overwrites:
     ROLE = 0
     MEMBER = 1
 
-    def __init__(self, data: PermissionOverwritePayload):
+    def __init__(self, data: PermissionOverwritePayload) -> None:
         self.id: int = int(data['id'])
         self.allow: int = int(data.get('allow', 0))
         self.deny: int = int(data.get('deny', 0))