1 files changed, 1 insertions, 1 deletions
diff --git a/Lib/enum.py b/Lib/enum.py
index 476e3b3..c3a0a8b 100644
--- a/Lib/enum.py
+++ b/Lib/enum.py
@@ -124,7 +124,7 @@ class EnumMeta(type):
 
         # save attributes from super classes so we know if we can take
         # the shortcut of storing members in the class dict
-        base_attributes = {a for b in bases for a in b.__dict__}
+        base_attributes = {a for b in enum_class.mro() for a in b.__dict__}
 
         # Reverse value->name map for hashable values.
         enum_class._value2member_map_ = {}