diff --git a/models/res_partner.py b/models/res_partner.py
index 98ca172a4a07b8516ddaf8b785be3483e73eda6b..29ac218e23e9dd00d8caaf98ee988f0e4e3ce3ea 100644
--- a/models/res_partner.py
+++ b/models/res_partner.py
@@ -745,6 +745,7 @@ class ScopPartner(models.Model):
 
     @api.depends('membership_period_ids',
                  'membership_period_ids.end_reason_id',
+                 'membership_period_ids.number',
                  'membership_period_ids.end')
     @api.multi
     def _compute_membership(self):