diff --git a/website/client-old/js/services/paymentServices.js b/website/client-old/js/services/paymentServices.js
index 5375339511..1256d4fca2 100644
--- a/website/client-old/js/services/paymentServices.js
+++ b/website/client-old/js/services/paymentServices.js
@@ -22,7 +22,7 @@ function($rootScope, User, $http, Content, Notification) {
   };
 
   Payments.checkGemAmount = function(data) {
-    if(data.gift.type === "gems" && !data.gift.gems.amount || data.gift.gems.amount === 0) {
+    if (data.gift.type === "gems" && (!data.gift.gems.amount || data.gift.gems.amount === 0)) {
       Notification.error(window.env.t('badAmountOfGemsToPurchase'), true);
       return false;
     }