diff --git a/core/includes/theme.inc b/core/includes/theme.inc
index 1010c29..b71422c 100644
--- a/core/includes/theme.inc
+++ b/core/includes/theme.inc
@@ -2236,7 +2236,7 @@ function template_preprocess_html(&$variables) {
 
   $site_config = \Drupal::config('system.site');
   // Construct page title.
-  if (isset($variables['page']['#title'])) {
+  if (!empty($variables['page']['#title'])) {
     $head_title = array(
       'title' => strip_tags($variables['page']['#title']),
       'name' => String::checkPlain($site_config->get('name')),