diff -r 314a872f54e1 Lib/enum.py
--- a/Lib/enum.py	Fri Aug 02 20:39:46 2013 +0200
+++ b/Lib/enum.py	Fri Aug 02 15:33:04 2013 -0400
@@ -127,6 +127,7 @@
         enum_class = super().__new__(metacls, cls, bases, classdict)
         enum_class._member_names_ = []               # names in definition order
         enum_class._member_map_ = OrderedDict()      # name->value map
+        enum_class._member_type_ = member_type       # mixin class (int, tuple, str, etc)
 
         # Reverse value->name map for hashable values.
         enum_class._value2member_map_ = {}