diff --git a/stdlib/2and3/argparse.pyi b/stdlib/2and3/argparse.pyi
index bdb471a30..d1d837f74 100644
--- a/stdlib/2and3/argparse.pyi
+++ b/stdlib/2and3/argparse.pyi
@@ -383,6 +383,7 @@ class _SubParsersAction(Action):
     _prog_prefix: _Text
     _parser_class: Type[ArgumentParser]
     _name_parser_map: Dict[_Text, ArgumentParser]
+    choices: Dict[_Text, ArgumentParser]
     _choices_actions: List[Action]
     def __init__(self,
                  option_strings: Sequence[_Text],