diff --git a/builtins/3/builtins.pyi b/builtins/3/builtins.pyi
index be76c5700..c043eb170 100644
--- a/builtins/3/builtins.pyi
+++ b/builtins/3/builtins.pyi
@@ -31,6 +31,7 @@ class object:
 
     def __init__(self) -> None: ...
     def __new__(cls) -> Any: ...
+    def __setattr__(self, name: str, value: Any) -> None: ...
     def __eq__(self, o: object) -> bool: ...
     def __ne__(self, o: object) -> bool: ...
     def __str__(self) -> str: ...