diff --git a/stdlib/2.7/__builtin__.pyi b/stdlib/2.7/__builtin__.pyi
index 5d7674201..8b0ee5318 100644
--- a/stdlib/2.7/__builtin__.pyi
+++ b/stdlib/2.7/__builtin__.pyi
@@ -693,9 +693,7 @@ def iter(iterable: Iterable[_T]) -> Iterator[_T]: ...
 @overload
 def iter(function: Callable[[], _T], sentinel: _T) -> Iterator[_T]: ...
 def isinstance(o: object, t: Union[type, Tuple[type, ...]]) -> bool: ...
-def issubclass(cls: type, classinfo: type) -> bool: ...
-# TODO support this
-#def issubclass(type cld, classinfo: Sequence[type]) -> bool: ...
+def issubclass(cls: type, classinfo: Union[type, Tuple[type, ...]]) -> bool: ...
 def len(o: Sized) -> int: ...
 @overload
 def map(func: Callable[[_T1], _S], iter1: Iterable[_T1]) -> List[_S]: ...
diff --git a/stdlib/3/builtins.pyi b/stdlib/3/builtins.pyi
index 22d9b9cce..16e8c0f4e 100644
--- a/stdlib/3/builtins.pyi
+++ b/stdlib/3/builtins.pyi
@@ -670,9 +670,7 @@ def iter(iterable: Iterable[_T]) -> Iterator[_T]: ...
 @overload
 def iter(function: Callable[[], _T], sentinel: _T) -> Iterator[_T]: ...
 def isinstance(o: object, t: Union[type, Tuple[type, ...]]) -> bool: ...
-def issubclass(cls: type, classinfo: type) -> bool: ...
-# TODO support this
-#def issubclass(type cld, classinfo: Sequence[type]) -> bool: ...
+def issubclass(cls: type, classinfo: Union[type, Tuple[type, ...]]) -> bool: ...
 def len(o: Sized) -> int: ...
 def license() -> None: ...
 def locals() -> Dict[str, Any]: ...