Fix named tuples to work with vars().
diff --git a/Lib/collections.py b/Lib/collections.py
index b904980..2b6abd8 100644
--- a/Lib/collections.py
+++ b/Lib/collections.py
@@ -268,6 +268,8 @@
         'Return a new OrderedDict which maps field names to their values'
         return OrderedDict(zip(self._fields, self))
 
+    __dict__ = property(_asdict)
+
     def _replace(_self, **kwds):
         'Return a new {typename} object replacing specified fields with new values'
         result = _self._make(map(kwds.pop, {field_names!r}, _self))