diff --git a/CHANGELOG b/CHANGELOG
index a30fce3b43..b24c47208a 100644
--- a/CHANGELOG
+++ b/CHANGELOG
@@ -1,3 +1,4 @@
+* Ignore Fields that starts with "_"
 * Add comment on table and field for postgresql backend
 * Remove egenix-mx-base and replace it by python-dateutil
 * Add cache to safe_eval
diff --git a/trytond/model/model.py b/trytond/model/model.py
index d0ce7405db..0beb1f7c62 100644
--- a/trytond/model/model.py
+++ b/trytond/model/model.py
@@ -37,7 +37,7 @@ class Model(object):
             return self.__columns
         res = {}
         for attr in dir(self):
-            if attr in ('_columns', '_defaults', '_xxx2many_targets'):
+            if attr.startswith('_'):
                 continue
             if isinstance(getattr(self, attr), fields.Field):
                 res[attr] = getattr(self, attr)