diff --git a/sphinx/util/typing.py b/sphinx/util/typing.py
index 4e1b184e0..5c72d6f32 100644
--- a/sphinx/util/typing.py
+++ b/sphinx/util/typing.py
@@ -310,6 +310,8 @@ def stringify(annotation: Any) -> str:
         return INVALID_BUILTIN_CLASSES[annotation]
     elif (getattr(annotation, '__module__', None) == 'builtins' and
           hasattr(annotation, '__qualname__')):
+        if hasattr(annotation, '__args__'):  # PEP 585 generic
+            return repr(annotation)
         return annotation.__qualname__
     elif annotation is Ellipsis:
         return '...'