diff --git a/trytond/ir/default.py b/trytond/ir/default.py
index 9e823dcc1f..78495a07d2 100644
--- a/trytond/ir/default.py
+++ b/trytond/ir/default.py
@@ -15,6 +15,10 @@ class Default(OSV):
     clause = fields.Text('Clause')
     user = fields.Many2One('res.user', 'User', ondelete='cascade')
 
+    def __init__(self):
+        super(Default, self).__init__()
+        self._rpc_allowed += ['get_default',]
+
     def get_default(self, cursor, user, model, clause, context=None):
         res = {}
         test_user = user