diff --git a/stdlib/builtins.pyi b/stdlib/builtins.pyi
index fc6d21bf9..8b4347d9e 100644
--- a/stdlib/builtins.pyi
+++ b/stdlib/builtins.pyi
@@ -705,11 +705,11 @@ class slice(object):
     step: Any
     stop: Any
     @overload
-    def __init__(self, stop: Any) -> None: ...
+    def __init__(self, __stop: Any) -> None: ...
     @overload
-    def __init__(self, start: Any, stop: Any, step: Any = ...) -> None: ...
+    def __init__(self, __start: Any, __stop: Any, __step: Any = ...) -> None: ...
     __hash__: None  # type: ignore
-    def indices(self, len: SupportsIndex) -> tuple[int, int, int]: ...
+    def indices(self, __len: SupportsIndex) -> tuple[int, int, int]: ...
 
 class tuple(Sequence[_T_co], Generic[_T_co]):
     def __new__(cls: Type[_T], iterable: Iterable[_T_co] = ...) -> _T: ...