diff -r 9487c290e088 Lib/enum.py
--- a/Lib/enum.py	Sun Feb 16 14:53:55 2014 -0500
+++ b/Lib/enum.py	Mon Feb 17 08:54:35 2014 +0200
@@ -115,14 +115,6 @@
         # Reverse value->name map for hashable values.
         enum_class._value2member_map_ = {}
 
-        # check for a supported pickle protocols, and if not present sabotage
-        # pickling, since it won't work anyway
-        if member_type is not object:
-            methods = ('__getnewargs_ex__', '__getnewargs__',
-                    '__reduce_ex__', '__reduce__')
-            if not any(map(member_type.__dict__.get, methods)):
-                _make_class_unpicklable(enum_class)
-
         # instantiate them, checking for duplicates as we go
         # we instantiate first instead of checking for duplicates first in case
         # a custom __new__ is doing something funky with the values -- such as
@@ -167,7 +159,7 @@
 
         # double check that repr and friends are not the mixin's or various
         # things break (such as pickle)
-        for name in ('__repr__', '__str__', '__format__', '__getnewargs__', '__reduce_ex__'):
+        for name in ('__repr__', '__str__', '__format__', '__reduce_ex__'):
             class_method = getattr(enum_class, name)
             obj_method = getattr(member_type, name, None)
             enum_method = getattr(first_enum, name, None)
@@ -465,14 +457,13 @@
             val = self.value
         return cls.__format__(val, format_spec)
 
-    def __getnewargs__(self):
-        return (self._value_, )
-
     def __hash__(self):
         return hash(self._name_)
 
     def __reduce_ex__(self, proto):
-        return self.__class__, self.__getnewargs__()
+        if proto < 4:
+            return getattr, (self.__class__, self._name_)
+        return self.__class__.__qualname__ + '.' + self._name_
 
     # DynamicClassAttribute is used to provide access to the `name` and
     # `value` properties of enum members while keeping some measure of
diff -r 9487c290e088 Lib/test/test_enum.py
--- a/Lib/test/test_enum.py	Sun Feb 16 14:53:55 2014 -0500
+++ b/Lib/test/test_enum.py	Mon Feb 17 08:54:35 2014 +0200
@@ -1174,9 +1174,10 @@
         globals()['NEI'] = NEI
         NI5 = NamedInt('test', 5)
         self.assertEqual(NI5, 5)
+        for protocol in range(2, HIGHEST_PROTOCOL + 1):
+            self.assertRaises(TypeError, loads, dumps(NI5, protocol=protocol))
         self.assertEqual(NEI.y.value, 2)
-        test_pickle_exception(self.assertRaises, TypeError, NEI.x)
-        test_pickle_exception(self.assertRaises, PicklingError, NEI)
+        test_pickle_dump_load(self.assertIs, NEI.y)
 
     def test_tuple_subclass(self):
         class SomeTuple(tuple, Enum):