diff --git a/pycassa/columnfamilymap.py b/pycassa/columnfamilymap.py
index 41914b9c..ebc034a6 100644
--- a/pycassa/columnfamilymap.py
+++ b/pycassa/columnfamilymap.py
@@ -14,6 +14,7 @@
 from pycassa.types import CassandraType
 from pycassa.columnfamily import ColumnFamily
 import pycassa.util as util
+import inspect
 
 __all__ = ['ColumnFamilyMap']
 
@@ -51,7 +52,7 @@ def __init__(self, cls, pool, column_family, raw_columns=False, **kwargs):
         self.dict_class = util.OrderedDict
         self.defaults = {}
         self.fields = []
-        for name, val_type in self.cls.__dict__.iteritems():
+        for name, val_type in inspect.getmembers(self.cls):
             if name != 'key' and isinstance(val_type, CassandraType):
                 self.fields.append(name)
                 self.column_validators[name] = val_type