diff --git a/models/partner.py b/models/partner.py
index 007557b..7390d11 100755
--- a/models/partner.py
+++ b/models/partner.py
@@ -154,6 +154,10 @@ class ResPartner(models.Model):
                
                 raise ValidationError('Invalid email')
     
+    @api.onchange('zip')
+    def _onchange_zip(self):
+        pass
+
     def add_partners_to_main_sb_list(self):
 
         mailing_list=self.env['mailing.list'].sudo().search([('name','=','Newsletter '+self.env.company.name)])