diff --git a/stdlib/sys.pyi b/stdlib/sys.pyi
index 274e4b90fd6e..b5829884482a 100644
--- a/stdlib/sys.pyi
+++ b/stdlib/sys.pyi
@@ -161,7 +161,7 @@ def _current_frames() -> dict[int, FrameType]: ...
 def _getframe(__depth: int = ...) -> FrameType: ...
 def _debugmallocstats() -> None: ...
 def __displayhook__(value: object) -> None: ...
-def __excepthook__(type_: Type[BaseException], value: BaseException, traceback: TracebackType) -> None: ...
+def __excepthook__(type_: Type[BaseException], value: BaseException, traceback: TracebackType | None) -> None: ...
 def exc_info() -> _OptExcInfo: ...
 
 # sys.exit() accepts an optional argument of anything printable