diff --git a/addons/point_of_sale/static/src/js/models.js b/addons/point_of_sale/static/src/js/models.js
index 24443942ba5..1e5fa2e937b 100644
--- a/addons/point_of_sale/static/src/js/models.js
+++ b/addons/point_of_sale/static/src/js/models.js
@@ -259,6 +259,7 @@ exports.PosModel = Backbone.Model.extend({
             // we attribute a role to the user, 'cashier' or 'manager', depending
             // on the group the user belongs.
             var pos_users = [];
+            var current_cashier = self.get_cashier();
             for (var i = 0; i < users.length; i++) {
                 var user = users[i];
                 for (var j = 0; j < user.groups_id.length; j++) {
@@ -276,6 +277,8 @@ exports.PosModel = Backbone.Model.extend({
                 // replace the current user with its updated version
                 if (user.id === self.user.id) {
                     self.user = user;
+                }
+                if (user.id === current_cashier.id) {
                     self.set_cashier(user);
                 }
             }
@@ -629,7 +632,7 @@ exports.PosModel = Backbone.Model.extend({
     // changes the current cashier
     set_cashier: function(user){
         this.set('cashier', user);
-        this.db.set_cashier(this.cashier);
+        this.db.set_cashier(this.get('cashier'));
     },
     //creates a new empty order and sets it as the current order
     add_new_order: function(){