diff --git a/Lib/enum.py b/Lib/enum.py
index 8c8409b..576de03 100644
--- a/Lib/enum.py
+++ b/Lib/enum.py
@@ -383,7 +383,7 @@
             raise AttributeError('Cannot reassign members.')
         super().__setattr__(name, value)
 
-    def _create_(cls, class_name, names=None, *, module=None, qualname=None, type=None, start=1):
+    def _create_(cls, class_name, names, *, module=None, qualname=None, type=None, start=1):
         """Convenience method to create a new Enum class.
 
         `names` can be: