diff --git a/core/src/main/resources/jenkins/install/SetupWizard/setInitialRootUrlFieldValue.js b/core/src/main/resources/jenkins/install/SetupWizard/setInitialRootUrlFieldValue.js
index 9faabe82815b..64808b501098 100644
--- a/core/src/main/resources/jenkins/install/SetupWizard/setInitialRootUrlFieldValue.js
+++ b/core/src/main/resources/jenkins/install/SetupWizard/setInitialRootUrlFieldValue.js
@@ -1,4 +1,4 @@
-var rootUrlField = $("root-url");
+var rootUrlField = document.getElementById("root-url");
 
 rootUrlField.focus();
 rootUrlField.onkeydown = function (event) {