diff --git a/stdlib/2and3/pkgutil.pyi b/stdlib/2and3/pkgutil.pyi
index c7bad4221..122dff000 100644
--- a/stdlib/2and3/pkgutil.pyi
+++ b/stdlib/2and3/pkgutil.pyi
@@ -24,7 +24,7 @@ class ImpLoader:
     def __init__(self, fullname: str, file: IO[str], filename: str,
                  etc: Tuple[str, str, int]) -> None: ...
 
-def find_loader(fullname: str) -> Loader: ...
+def find_loader(fullname: str) -> Optional[Loader]: ...
 def get_importer(path_item: str) -> Any: ...  # TODO precise type
 def get_loader(module_or_name: str) -> Loader: ...
 def iter_importers(fullname: str = ...) -> Generator[Any, None, None]: ...  # TODO precise type