diff --git a/stdlib/2/UserDict.pyi b/stdlib/2/UserDict.pyi
index a30c2e9b0..2d2b8c6c4 100644
--- a/stdlib/2/UserDict.pyi
+++ b/stdlib/2/UserDict.pyi
@@ -14,7 +14,7 @@ class UserDict(Dict[_KT, _VT], Generic[_KT, _VT]):
 class IterableUserDict(UserDict[_KT, _VT], Generic[_KT, _VT]):
     ...
 
-class DictMixin(Sized, Iterable[_KT], Container[_KT], Generic[_KT, _VT]):
+class DictMixin(Iterable[_KT], Container[_KT], Sized, Generic[_KT, _VT]):
     def has_key(self, key: _KT) -> bool: ...
 
     # From  typing.Mapping[_KT, _VT]