diff --git a/core/src/main/resources/lib/hudson/project/configurable/adjunct.js b/core/src/main/resources/lib/hudson/project/configurable/adjunct.js
index 9ae96e340acc4..45a62010d98a5 100644
--- a/core/src/main/resources/lib/hudson/project/configurable/adjunct.js
+++ b/core/src/main/resources/lib/hudson/project/configurable/adjunct.js
@@ -1,12 +1,12 @@
 window["lib_hudson_project_configurable_build_now_callback"] = function (
   el,
-  ev
+  ev,
 ) {
   let parameterized = el.dataset.parameterized;
   let success = el.dataset.success;
   if (parameterized === "false") {
-    fetch(a.href, {
-      method: 'post',
+    fetch(el.href, {
+      method: "post",
       headers: crumb.wrap({}),
     });
     hoverNotification(success, ev.target.parentNode);