diff --git a/osinaweb/billing/templates/details_templates/order-details.html b/osinaweb/billing/templates/details_templates/order-details.html
index 3d39fcf1..86f08aa4 100644
--- a/osinaweb/billing/templates/details_templates/order-details.html
+++ b/osinaweb/billing/templates/details_templates/order-details.html
@@ -42,7 +42,7 @@
             </button>
 
             {% if not order.invoice %}
-            <a class="w-full md:w-fit" href="{% url 'addinvoice' order.id}">
+            <a class="w-full md:w-fit" href="{% url 'addinvoice' order.id %}">
                 <button
                     class="w-full md:w-fit text-base px-3 py-2 bg-osiblue text-white outline-none border border-osiblue rounded-md cursor-pointer hover:bg-white hover:text-osiblue duration-300">
                     Generate Invoice