diff --git a/packages/app-next/src/index-public-experimental.tsx b/packages/app-next/src/index-public-experimental.tsx
index 16535dae98..24c4a9d66a 100644
--- a/packages/app-next/src/index-public-experimental.tsx
+++ b/packages/app-next/src/index-public-experimental.tsx
@@ -16,6 +16,7 @@
 
 import ReactDOM from 'react-dom/client';
 import { createPublicSignInApp } from '@backstage/frontend-defaults';
+import '@backstage/canon/css/styles.css';
 
 const app = createPublicSignInApp();
 
diff --git a/packages/app/src/index-public-experimental.tsx b/packages/app/src/index-public-experimental.tsx
index 20f111dc2b..d295c7da09 100644
--- a/packages/app/src/index-public-experimental.tsx
+++ b/packages/app/src/index-public-experimental.tsx
@@ -31,6 +31,7 @@ import {
   discoveryApiRef,
 } from '@backstage/core-plugin-api';
 import { AuthProxyDiscoveryApi } from '../src/AuthProxyDiscoveryApi';
+import '@backstage/canon/css/styles.css';
 
 const app = createApp({
   apis: [