diff --git a/modules/web_shop_shopify/sale.py b/modules/web_shop_shopify/sale.py
index 404ef2e48c..ace1b3b1ab 100644
--- a/modules/web_shop_shopify/sale.py
+++ b/modules/web_shop_shopify/sale.py
@@ -152,6 +152,7 @@ class Sale(IdentifierMixin, metaclass=PoolMeta):
             lines.append(line)
         for line in id2line.values():
             line.quantity = 0
+            lines.append(line)
         sale.lines = lines
         return sale