diff --git a/sphinx/util/typing.py b/sphinx/util/typing.py
index 87707d48f48..a2ab5f93102 100644
--- a/sphinx/util/typing.py
+++ b/sphinx/util/typing.py
@@ -144,7 +144,7 @@ def restify(cls: Optional[Type]) -> str:
             else:
                 return _restify_py36(cls)
     except (AttributeError, TypeError):
-        return repr(cls)
+        return inspect.object_description(cls)
 
 
 def _restify_py37(cls: Optional[Type]) -> str: