diff --git a/addons/point_of_sale/static/src/js/db.js b/addons/point_of_sale/static/src/js/db.js
index 64d5b47a45b..2729d7118e9 100644
--- a/addons/point_of_sale/static/src/js/db.js
+++ b/addons/point_of_sale/static/src/js/db.js
@@ -298,7 +298,7 @@ openerp.point_of_sale.load_db = function load_db(instance, module){
             return updated_count;
         },
         get_partner_write_date: function(){
-            return this.partner_write_date;
+            return this.partner_write_date || "1970-01-01 00:00:00";
         },
         get_partner_by_id: function(id){
             return this.partner_by_id[id];
diff --git a/addons/point_of_sale/static/src/js/models.js b/addons/point_of_sale/static/src/js/models.js
index e0b1088ebd6..de51cc10169 100644
--- a/addons/point_of_sale/static/src/js/models.js
+++ b/addons/point_of_sale/static/src/js/models.js
@@ -480,7 +480,7 @@ openerp.point_of_sale.load_models = function load_models(instance, module){ //mo
             var fields = _.find(this.models,function(model){ return model.model === 'res.partner'; }).fields;
             new instance.web.Model('res.partner')
                 .query(fields)
-                .filter([['write_date','>',this.db.get_partner_write_date()]])
+                .filter([['customer','=',true],['write_date','>',this.db.get_partner_write_date()]])
                 .all({'timeout':3000, 'shadow': true})
                 .then(function(partners){
                     if (self.db.add_partners(partners)) {   // check if the partners we got were real updates