diff --git a/stdlib/3/multiprocessing/__init__.pyi b/stdlib/3/multiprocessing/__init__.pyi
index b9910b118..f797b548a 100644
--- a/stdlib/3/multiprocessing/__init__.pyi
+++ b/stdlib/3/multiprocessing/__init__.pyi
@@ -80,5 +80,5 @@ def Manager() -> SyncManager: ...
 def set_forkserver_preload(module_names: List[str]) -> None: ...
 def get_all_start_methods() -> List[str]: ...
 def get_context(method: Optional[str] = ...) -> BaseContext: ...
-def get_start_method(allow_none: Optional[bool]) -> Optional[str]: ...
+def get_start_method(allow_none: bool = ...) -> Optional[str]: ...
 def set_start_method(method: str, force: Optional[bool] = ...) -> None: ...