diff --git a/website/common/script/ops/buy/abstractBuyOperation.js b/website/common/script/ops/buy/abstractBuyOperation.js
index f325fa7e5b..f4627e2d2d 100644
--- a/website/common/script/ops/buy/abstractBuyOperation.js
+++ b/website/common/script/ops/buy/abstractBuyOperation.js
@@ -18,14 +18,10 @@ export class AbstractBuyOperation {
     this.req = req || {};
     this.analytics = analytics;
 
-    this.quantity = 1;
+    let quantity = _get(req, 'quantity');
 
-    if (this.multiplePurchaseAllowed()) {
-      let quantity = _get(req, 'quantity');
-
-      this.quantity = quantity ? Number(quantity) : 1;
-      if (isNaN(this.quantity)) throw new BadRequest(this.i18n('invalidQuantity'));
-    }
+    this.quantity = quantity ? Number(quantity) : 1;
+    if (isNaN(this.quantity)) throw new BadRequest(this.i18n('invalidQuantity'));
   }
 
   /**