diff --git a/stdlib/3/asyncio/futures.pyi b/stdlib/3/asyncio/futures.pyi
index c9a2ac44a18d..f4f97c607d23 100644
--- a/stdlib/3/asyncio/futures.pyi
+++ b/stdlib/3/asyncio/futures.pyi
@@ -51,7 +51,7 @@ class Future(Awaitable[_T], Iterable[_T]):
     def cancelled(self) -> bool: ...
     def done(self) -> bool: ...
     def result(self) -> _T: ...
-    def exception(self) -> BaseException: ...
+    def exception(self) -> Optional[BaseException]: ...
     def remove_done_callback(self: _S, fn: Callable[[_S], Any]) -> int: ...
     def set_result(self, result: _T) -> None: ...
     def set_exception(self, exception: Union[type, BaseException]) -> None: ...