diff --git a/addons/mail/models/mail_activity.py b/addons/mail/models/mail_activity.py
index 2f12a2eb0a4..71ccce481bf 100644
--- a/addons/mail/models/mail_activity.py
+++ b/addons/mail/models/mail_activity.py
@@ -163,6 +163,7 @@ class MailActivity(models.Model):
         'res.users', 'Assigned to',
         default=lambda self: self.env.user,
         index=True, required=True)
+    request_partner_id = fields.Many2one('res.partner', string='Requesting Partner')
     state = fields.Selection([
         ('overdue', 'Overdue'),
         ('today', 'Today'),