diff --git a/app/assets/javascripts/application.js b/app/assets/javascripts/application.js
index 58c84a987c0..51516540ed3 100644
--- a/app/assets/javascripts/application.js
+++ b/app/assets/javascripts/application.js
@@ -255,7 +255,7 @@ function template_info(div, url) {
   // Use a post to avoid request URI too large issues with big forms
   $.ajax({
     type: "POST",
-    url: url + "&provisioning=" + build,
+    url: url + ((url.indexOf('?') == -1) ? '?' : '&') + "provisioning=" + build,
     data: form,
     success: function(response, status, xhr) {
       $(div).html(response);