diff --git a/core/modules/help_topics/help_topics.module b/core/modules/help_topics/help_topics.module
index b44d61f..825199d 100644
--- a/core/modules/help_topics/help_topics.module
+++ b/core/modules/help_topics/help_topics.module
@@ -12,9 +12,9 @@
  * Implements hook_help().
  */
 function help_topics_help($route_name, RouteMatchInterface $route_match) {
-  $help_home = Url::fromRoute('help.main')->toString();
   switch ($route_name) {
     case 'help.page.help_topics':
+      $help_home = Url::fromRoute('help.main')->toString();
       $locale_help = (\Drupal::moduleHandler()->moduleExists('locale')) ? Url::fromRoute('help.page', ['name' => 'locale'])->toString() : '#';
       $output = '';
       $output .= '<h3>' . t('About') . '</h3>';
@@ -31,6 +31,7 @@ function help_topics_help($route_name, RouteMatchInterface $route_match) {
       return ['#markup' => $output];
 
     case 'help_topics.help_topic':
+      $help_home = Url::fromRoute('help.main')->toString();
       return '<p>' . t('See the <a href=":help_page">Help page</a> for more topics.', [
         ':help_page' => $help_home,
       ]) . '</p>';