diff --git a/addons/mass_mailing_sms/models/mailing_mailing.py b/addons/mass_mailing_sms/models/mailing_mailing.py
index 7fcc0f1b6d6..3d0d75c78fb 100644
--- a/addons/mass_mailing_sms/models/mailing_mailing.py
+++ b/addons/mass_mailing_sms/models/mailing_mailing.py
@@ -12,6 +12,13 @@ _logger = logging.getLogger(__name__)
 class Mailing(models.Model):
     _inherit = 'mailing.mailing'
 
+    @api.model
+    def default_get(self, fields):
+        res = super(Mailing, self).default_get(fields)
+        if fields is not None and 'keep_archives' in fields and res.get('mailing_type') == 'sms':
+            res['keep_archives'] = True
+        return res
+
     # mailing options
     mailing_type = fields.Selection(selection_add=[('sms', 'SMS')])
     # sms options