diff --git a/addons/point_of_sale/static/src/js/models.js b/addons/point_of_sale/static/src/js/models.js
index 6e12dc8b114..25b31fd0b8f 100644
--- a/addons/point_of_sale/static/src/js/models.js
+++ b/addons/point_of_sale/static/src/js/models.js
@@ -1152,7 +1152,8 @@ exports.Orderline = Backbone.Model.extend({
                 if (unit.rounding) {
                     this.quantity    = round_pr(quant, unit.rounding);
                     var decimals = this.pos.dp['Product Unit of Measure'];
-                    this.quantityStr = formats.format_value(round_di(this.quantity, decimals), { type: 'float', digits: [69, decimals]});
+                    this.quantity = round_di(this.quantity, decimals)
+                    this.quantityStr = formats.format_value(this.quantity, { type: 'float', digits: [69, decimals]});
                 } else {
                     this.quantity    = round_pr(quant, 1);
                     this.quantityStr = this.quantity.toFixed(0);