diff --git a/core/lib/Drupal/Core/Installer/Form/SiteConfigureForm.php b/core/lib/Drupal/Core/Installer/Form/SiteConfigureForm.php
index 37a3d3d..f369b9b 100644
--- a/core/lib/Drupal/Core/Installer/Form/SiteConfigureForm.php
+++ b/core/lib/Drupal/Core/Installer/Form/SiteConfigureForm.php
@@ -205,7 +205,7 @@ public function buildForm(array $form, FormStateInterface $form_state) {
       '#weight' => 0,
       '#access' => !$install_state['profile_info']['config_install'],
     ];
-    $form['regional_settings']['date_default_timezone'] = []
+    $form['regional_settings']['date_default_timezone'] = [
       '#type' => 'select',
       '#title' => $this->t('Default time zone'),
       // Use system timezone if set, but avoid throwing a warning in PHP >=5.4
@@ -220,8 +220,9 @@ public function buildForm(array $form, FormStateInterface $form_state) {
     $form['update_notifications'] = [
       '#type' => 'fieldgroup',
       '#title' => $this->t('Update notifications'),
+      '#description' => $this->t('The system will notify you when updates and important security releases are available for installed components. Anonymous information about your site is sent to <a href=":drupal">Drupal.org</a>.', [':drupal' => 'https://www.drupal.org']),
       '#access' => !$install_state['profile_info']['config_install'],
-    );
+    ];
     $form['update_notifications']['enable_update_status_module'] = [
       '#type' => 'checkbox',
       '#title' => $this->t('Check for updates automatically'),