diff --git a/core/lib/Drupal/Core/Template/TwigExtension.php b/core/lib/Drupal/Core/Template/TwigExtension.php
index 2b76b20..ce85bf2 100644
--- a/core/lib/Drupal/Core/Template/TwigExtension.php
+++ b/core/lib/Drupal/Core/Template/TwigExtension.php
@@ -114,10 +114,11 @@ public function getFilters() {
       // The "raw" filter is not detectable when parsing "trans" tags. To detect
       // which prefix must be used for translation (@, !, %), we must clone the
       // "raw" filter and give it identifiable names. These filters should only
-      // be used in "trans" tags.
+      // be used in "trans" tags. Placeholder is not defined as safe in case
+      // it is used outside of "trans" tags.
       // @see TwigNodeTrans::compileString()
       new \Twig_SimpleFilter('passthrough', 'twig_raw_filter', array('is_safe' => array('html'))),
-      new \Twig_SimpleFilter('placeholder', 'twig_raw_filter', array('is_safe' => array('html'))),
+      new \Twig_SimpleFilter('placeholder', 'twig_raw_filter'),
 
       // Replace twig's escape filter with our own.
       new \Twig_SimpleFilter('drupal_escape', [$this, 'escapeFilter'], array('needs_environment' => true, 'is_safe_callback' => 'twig_escape_filter_is_safe')),