diff --git a/third_party/2and3/decorator.pyi b/third_party/2and3/decorator.pyi
index ee090a6b9..3443cd78b 100644
--- a/third_party/2and3/decorator.pyi
+++ b/third_party/2and3/decorator.pyi
@@ -75,7 +75,7 @@ class FunctionMaker(object):
     ) -> Callable[..., Any]: ...
 
 def decorate(func: _Func, caller: Callable[..., Any], extras: Any = ...) -> _Func: ...
-def decorator(caller: Callable[..., Any], _func: Optional[Callable[..., Any]] = ...) -> Callable[[_C], _C]: ...
+def decorator(caller: Callable[..., Any], _func: Optional[Callable[..., Any]] = ...) -> Callable[[Callable[..., Any]], Callable[..., Any]]: ...
 
 class ContextManager(_GeneratorContextManager[_T]):
     def __call__(self, func: _C) -> _C: ...