diff --git a/addons/point_of_sale/static/src/js/devices.js b/addons/point_of_sale/static/src/js/devices.js
index e7e7ab50c2b..d36fd6277ed 100644
--- a/addons/point_of_sale/static/src/js/devices.js
+++ b/addons/point_of_sale/static/src/js/devices.js
@@ -27,7 +27,7 @@ function openerp_pos_devices(instance,module){ //module is instance.point_of_sal
 
             this.connection = new instance.web.JsonRPC();
             this.connection.setup(url);
-
+            this.connection.session_id = _.uniqueId('posproxy');
             this.bypass_proxy = false;
             this.notifications = {};