diff --git a/stdlib/2/collections.pyi b/stdlib/2/collections.pyi
index c2f0af268..3235e9bd1 100644
--- a/stdlib/2/collections.pyi
+++ b/stdlib/2/collections.pyi
@@ -70,9 +70,10 @@ class Counter(Dict[_T, int], Generic[_T]):
     @overload
     def update(self, m: Union[Iterable[_T], Iterable[Tuple[_T, int]]], **kwargs: _VT) -> None: ...
 
-class OrderedDict(Dict[_KT, _VT], Generic[_KT, _VT]):
+class OrderedDict(Dict[_KT, _VT], Reversible[_KT], Generic[_KT, _VT]):
     def popitem(self, last: bool = ...) -> Tuple[_KT, _VT]: ...
     def move_to_end(self, key: _KT, last: bool = ...) -> None: ...
+    def __reversed__(self) -> Iterator[_KT]: ...
 
 class defaultdict(Dict[_KT, _VT], Generic[_KT, _VT]):
     default_factory = ...  # type: Callable[[], _VT]
diff --git a/stdlib/3/collections/__init__.pyi b/stdlib/3/collections/__init__.pyi
index 5cb89f7a3..0f059ec3d 100644
--- a/stdlib/3/collections/__init__.pyi
+++ b/stdlib/3/collections/__init__.pyi
@@ -139,10 +139,10 @@ class Counter(Dict[_T, int], Generic[_T]):
     def __iand__(self, other: Counter[_T]) -> Counter[_T]: ...
     def __ior__(self, other: Counter[_T]) -> Counter[_T]: ...
 
-class OrderedDict(Dict[_KT, _VT], Generic[_KT, _VT]):
+class OrderedDict(Dict[_KT, _VT], Reversible[_KT], Generic[_KT, _VT]):
     def popitem(self, last: bool = ...) -> Tuple[_KT, _VT]: ...
     def move_to_end(self, key: _KT, last: bool = ...) -> None: ...
-
+    def __reversed__(self) -> Iterator[_KT]: ...
 
 class defaultdict(Dict[_KT, _VT], Generic[_KT, _VT]):
     default_factory = ...  # type: Callable[[], _VT]