diff --git a/packages/ui-default/backendlib/builder.ts b/packages/ui-default/backendlib/builder.ts
index b252890d8..0bc30d32f 100644
--- a/packages/ui-default/backendlib/builder.ts
+++ b/packages/ui-default/backendlib/builder.ts
@@ -146,10 +146,9 @@ export async function buildUI() {
 class UiConstantsHandler extends Handler {
   noCheckPermView = true;
 
-  @param('name', Types.Filename, true)
+  @param('name', Types.Filename)
   async all(domainId: string, name: string) {
     this.response.type = 'application/javascript';
-    name ||= 'entry.js';
     if (!vfs[name]) throw new NotFoundError(name);
     this.response.addHeader('ETag', hashes[name]);
     this.response.body = vfs[name];
@@ -158,7 +157,6 @@ class UiConstantsHandler extends Handler {
 }
 
 export async function apply(ctx: Context) {
-  ctx.Route('constant', '/constant/:version', UiConstantsHandler);
   ctx.Route('constant', '/lazy/:version/:name', UiConstantsHandler);
   ctx.Route('constant', '/resource/:version/:name', UiConstantsHandler);
   ctx.on('app/started', buildUI);
diff --git a/packages/ui-default/templates/layout/html5.html b/packages/ui-default/templates/layout/html5.html
index 2f3139b81..01fdc69f3 100644
--- a/packages/ui-default/templates/layout/html5.html
+++ b/packages/ui-default/templates/layout/html5.html
@@ -57,7 +57,7 @@
 </head>
 <body>
   {% if not isIE(handler.request.headers['user-agent']) and not handler.session.legacy %}
-    <script type="text/javascript" src="/constant/{{ UiContext.constantVersion }}.js"></script>
+    <script type="text/javascript" src="/resource/{{ UiContext.constantVersion }}/entry.js"></script>
     <script type="text/javascript" src="{{ UiContext.cdn_prefix }}resource/{{ global.Hydro.version['ui-default'] }}/lang-{{ _('__id') }}.js"></script>
     <script type="text/javascript" src="{{ UiContext.cdn_prefix }}hydro-{{ global.Hydro.version['ui-default'] }}.js{% if process.env.DEV %}?version=dev{% endif %}"></script>
   {% endif %}