diff --git a/super_calendar/super_calendar.py b/super_calendar/super_calendar.py
index 5cffa8918..57c698f66 100644
--- a/super_calendar/super_calendar.py
+++ b/super_calendar/super_calendar.py
@@ -25,6 +25,7 @@ from openerp import logging
 from mako.template import Template
 from datetime import datetime
 from openerp import tools
+from tools.safe_eval import safe_eval as eval
 
 def _models_get(self, cr, uid, context=None):
     obj = self.pool.get('ir.model')