diff --git a/addons/calendar/models/calendar.py b/addons/calendar/models/calendar.py
index ab0ce39373e..7103a103b06 100644
--- a/addons/calendar/models/calendar.py
+++ b/addons/calendar/models/calendar.py
@@ -841,7 +841,7 @@ class Meeting(models.Model):
 
     @api.multi
     def _compute_color_partner(self):
-        for meeting in self:
+        for meeting in self.sudo():
             meeting.color_partner_id = meeting.user_id.partner_id.id
 
     @api.constrains('start_datetime', 'stop_datetime', 'start_date', 'stop_date')