diff --git a/app/Controllers/AuthController.php b/app/Controllers/AuthController.php
index 14f9e23..02e9905 100644
--- a/app/Controllers/AuthController.php
+++ b/app/Controllers/AuthController.php
@@ -57,6 +57,7 @@ class AuthController
                 'view'       => $viewPath,
                 'data'       => [
                         'error' => $errorMessage,
+                        'loginPage' => true,
                 ],
                 'pageTitle'  => 'Login',
             // Beim Login ist typischerweise kein Menüpunkt aktiv.
diff --git a/public/views/layout.php b/public/views/layout.php
index 9482998..03524f1 100644
--- a/public/views/layout.php
+++ b/public/views/layout.php
@@ -38,7 +38,7 @@ function renderLayout(string $contentView, array $viewData, string $pageTitle, ?
     <!-- Page Wrapper -->
     <div id="wrapper">
         <!-- Begin Sidebar -->
-        <?php if (!defined('LOGIN_PAGE')): require $partialsPath . '/sidebar.php'; endif ?>
+        <?php if (!$viewData['loginPage']): require $partialsPath . '/sidebar.php'; endif ?>
         <!-- End of Sidebar -->
         <!-- Content Wrapper -->
         <div id="content-wrapper" class="d-flex flex-column">
@@ -46,7 +46,7 @@ function renderLayout(string $contentView, array $viewData, string $pageTitle, ?
             <!-- Main Content -->
             <div id="content">
                 <!-- Begin Topbar -->
-                <?php if (!defined('LOGIN_PAGE')): require $partialsPath . '/topbar.php'; endif; ?>
+                <?php if (!$viewData['loginPage']): require $partialsPath . '/topbar.php'; endif; ?>
                 <!-- End of Topbar -->
                 <!-- Begin Page Content -->
                 <div class="container-fluid">