diff --git a/stdlib/2and3/optparse.pyi b/stdlib/2and3/optparse.pyi
index 2e52647f5..03532d910 100644
--- a/stdlib/2and3/optparse.pyi
+++ b/stdlib/2and3/optparse.pyi
@@ -224,3 +224,4 @@ class Values:
     def ensure_value(self, attr: Any, value: Any) -> Any: ...
     def read_file(self, filename: _Text, mode: _Text) -> None: ...
     def read_module(self, modname: _Text, mode: _Text) -> None: ...
+    def __getattr__(self, name: str) -> Any: ...