diff --git a/stdlib/builtins.pyi b/stdlib/builtins.pyi
index b0912b887..0a6dc57b0 100644
--- a/stdlib/builtins.pyi
+++ b/stdlib/builtins.pyi
@@ -1295,7 +1295,7 @@ def ascii(obj: object, /) -> str: ...
 def bin(number: int | SupportsIndex, /) -> str: ...
 def breakpoint(*args: Any, **kws: Any) -> None: ...
 def callable(obj: object, /) -> TypeIs[Callable[..., object]]: ...
-def chr(i: int, /) -> str: ...
+def chr(i: int | SupportsIndex, /) -> str: ...
 
 # We define this here instead of using os.PathLike to avoid import cycle issues.
 # See https://github.com/python/typeshed/pull/991#issuecomment-288160993