diff --git a/stdlib/builtins.pyi b/stdlib/builtins.pyi
index 44e76da31b6d..9c5685440f0e 100644
--- a/stdlib/builtins.pyi
+++ b/stdlib/builtins.pyi
@@ -1087,9 +1087,7 @@ def input(__prompt: object = ...) -> str: ...
 @overload
 def iter(__iterable: Iterable[_T]) -> Iterator[_T]: ...
 @overload
-def iter(__function: Callable[[], _T | None], __sentinel: None) -> Iterator[_T]: ...
-@overload
-def iter(__function: Callable[[], _T], __sentinel: object) -> Iterator[_T]: ...
+def iter(__function: Callable[[], _T | _S], __sentinel: _S) -> Iterator[_T]: ...
 
 # We need recursive types to express the type of the second argument to `isinstance` properly, hence the use of `Any`
 if sys.version_info >= (3, 10):