diff --git a/core/includes/theme.inc b/core/includes/theme.inc
index 7dc4c5b..e8cff8b 100644
--- a/core/includes/theme.inc
+++ b/core/includes/theme.inc
@@ -1300,7 +1300,7 @@ function template_preprocess_html(&$variables) {
     'scripts_bottom' => 'js-bottom',
     'head' => 'head',
   ];
-  $variables['placeholder_token'] = Markup::create(Crypt::randomBytesBase64(55));
+  $variables['placeholder_token'] = Crypt::randomBytesBase64(55);
   foreach ($types as $type => $placeholder_name) {
     $placeholder = '<' . $placeholder_name . '-placeholder token="' . $variables['placeholder_token'] . '">';
     $variables['#attached']['html_response_attachment_placeholders'][$type] = $placeholder;