diff --git a/addons/stock_sms/models/stock_picking.py b/addons/stock_sms/models/stock_picking.py
index 554a160fa56..dee5245f270 100644
--- a/addons/stock_sms/models/stock_picking.py
+++ b/addons/stock_sms/models/stock_picking.py
@@ -46,9 +46,12 @@ class Picking(models.Model):
         }
 
     def _sms_get_number_fields(self):
-        """ This method returns the fields to use to find the number to use to
-        send an SMS on a record. """
-        return ['mobile', 'phone']
+        """ No phone or mobile field is available on ``stock.picking`` model. Instead SMS will
+        fallback on partner-based computation using ``_sms_get_partner_fields``. """
+        return []
+
+    def _sms_get_partner_fields(self):
+        return ['partner_id']
 
     def _send_confirmation_email(self):
         super(Picking, self)._send_confirmation_email()