diff --git a/stdlib/types.pyi b/stdlib/types.pyi
index c282ab5b8..4047cf845 100644
--- a/stdlib/types.pyi
+++ b/stdlib/types.pyi
@@ -585,6 +585,7 @@ if sys.version_info >= (3, 9):
         @property
         def __parameters__(self) -> tuple[Any, ...]: ...
         def __init__(self, origin: type, args: Any) -> None: ...
+        def __getitem__(self, __typeargs: Any) -> GenericAlias: ...
         if sys.version_info >= (3, 11):
             @property
             def __unpacked__(self) -> bool: ...