diff --git a/addons/l10n_fr_pos_cert/static/src/css/pos.css b/addons/l10n_fr_pos_cert/static/src/css/pos.css
index 57dca4137df..1fae724ac47 100644
--- a/addons/l10n_fr_pos_cert/static/src/css/pos.css
+++ b/addons/l10n_fr_pos_cert/static/src/css/pos.css
@@ -1,3 +1,3 @@
 .oldPrice {
     font-weight: bold;
-}
\ No newline at end of file
+}
diff --git a/addons/point_of_sale/static/src/js/models.js b/addons/point_of_sale/static/src/js/models.js
index de9daf2e001..14abf961475 100644
--- a/addons/point_of_sale/static/src/js/models.js
+++ b/addons/point_of_sale/static/src/js/models.js
@@ -1309,7 +1309,7 @@ class Orderline extends PosModel {
             this.order.remove_orderline(this);
             return true;
         }else{
-            var quant = typeof(quantity) === 'number' ? quantity : (field_utils.parse.float('' + quantity) || 0);
+            var quant = typeof(quantity) === 'number' ? quantity : (field_utils.parse.float('' + (quantity ? quantity : 0 )));
             if (this.refunded_orderline_id in this.pos.toRefundLines) {
                 const toRefundDetail = this.pos.toRefundLines[this.refunded_orderline_id];
                 const maxQtyToRefund = toRefundDetail.orderline.qty - toRefundDetail.orderline.refundedQty