diff --git a/stdlib/2/multiprocessing/pool.pyi b/stdlib/2/multiprocessing/pool.pyi
index c69ea4bdf..2691bd067 100644
--- a/stdlib/2/multiprocessing/pool.pyi
+++ b/stdlib/2/multiprocessing/pool.pyi
@@ -15,6 +15,8 @@ class IMapIterator(Iterable[Any]):
     def __iter__(self) -> Iterator[Any]: ...
     def next(self, timeout: Optional[float] = ...) -> Any: ...
 
+class IMapUnorderedIterator(IMapIterator): ...
+
 class Pool(ContextManager[Pool]):
     def __init__(self, processes: Optional[int] = ...,
                  initializer: Optional[Callable[..., None]] = ...,
diff --git a/stdlib/3/multiprocessing/pool.pyi b/stdlib/3/multiprocessing/pool.pyi
index 71f30374b..b8e9facd5 100644
--- a/stdlib/3/multiprocessing/pool.pyi
+++ b/stdlib/3/multiprocessing/pool.pyi
@@ -20,6 +20,8 @@ class IMapIterator(Iterable[_T]):
     def next(self, timeout: Optional[float] = ...) -> _T: ...
     def __next__(self, timeout: Optional[float] = ...) -> _T: ...
 
+class IMapUnorderedIterator(IMapIterator): ...
+
 class Pool(ContextManager[Pool]):
     def __init__(self, processes: Optional[int] = ...,
                  initializer: Optional[Callable[..., None]] = ...,