diff --git a/stdlib/3/multiprocessing/managers.pyi b/stdlib/3/multiprocessing/managers.pyi
index 656ee8d2c..a5ec399d7 100644
--- a/stdlib/3/multiprocessing/managers.pyi
+++ b/stdlib/3/multiprocessing/managers.pyi
@@ -20,7 +20,12 @@ _Namespace = Namespace
 class BaseManager(ContextManager[BaseManager]):
     address: Union[str, Tuple[str, int]]
     def connect(self) -> None: ...
-    def register(self, typeid: str, callable: Any = ...) -> None: ...
+    @classmethod
+    def register(cls, typeid: str, callable: Optional[Callable] = ...,
+                 proxytype: Any = ...,
+                 exposed: Optional[Sequence[str]] = ...,
+                 method_to_typeid: Optional[Mapping[str, str]] = ...,
+                 create_method: bool = ...) -> None: ...
     def shutdown(self) -> None: ...
     def start(self, initializer: Optional[Callable[..., Any]] = ...,
               initargs: Iterable[Any] = ...) -> None: ...