diff --git a/stdlib/2/multiprocessing/pool.pyi b/stdlib/2/multiprocessing/pool.pyi
index e444240b4..57a628d33 100644
--- a/stdlib/2/multiprocessing/pool.pyi
+++ b/stdlib/2/multiprocessing/pool.pyi
@@ -8,8 +8,8 @@ from typing import (
 _T = TypeVar('_T', bound='Pool')
 
 class AsyncResult():
-    def get(self, timeout: float = ...) -> Any: ...
-    def wait(self, timeout: float = ...) -> None: ...
+    def get(self, timeout: Optional[float] = ...) -> Any: ...
+    def wait(self, timeout: Optional[float] = ...) -> None: ...
     def ready(self) -> bool: ...
     def successful(self) -> bool: ...
 
diff --git a/stdlib/3/multiprocessing/pool.pyi b/stdlib/3/multiprocessing/pool.pyi
index 311f900d5..c641e141a 100644
--- a/stdlib/3/multiprocessing/pool.pyi
+++ b/stdlib/3/multiprocessing/pool.pyi
@@ -10,8 +10,8 @@ from typing import (
 _T = TypeVar('_T', bound='Pool')
 
 class AsyncResult():
-    def get(self, timeout: float = ...) -> Any: ...
-    def wait(self, timeout: float = ...) -> None: ...
+    def get(self, timeout: Optional[float] = ...) -> Any: ...
+    def wait(self, timeout: Optional[float] = ...) -> None: ...
     def ready(self) -> bool: ...
     def successful(self) -> bool: ...