diff --git a/stdlib/2/__builtin__.pyi b/stdlib/2/__builtin__.pyi
index bedc1c480..064b651cd 100644
--- a/stdlib/2/__builtin__.pyi
+++ b/stdlib/2/__builtin__.pyi
@@ -509,7 +509,7 @@ class list(MutableSequence[_T], Generic[_T]):
     def __setitem__(self, s: slice, o: Iterable[_T]) -> None: ...
     def __setslice__(self, start: int, stop: int, o: Sequence[_T]) -> None: ...
     def __delitem__(self, i: Union[int, slice]) -> None: ...
-    def __delslice(self, start: int, stop: int) -> None: ...
+    def __delslice__(self, start: int, stop: int) -> None: ...
     def __add__(self, x: List[_T]) -> List[_T]: ...
     def __iadd__(self, x: Iterable[_T]) -> List[_T]: ...
     def __mul__(self, n: int) -> List[_T]: ...