diff --git a/agaric/templates/content/comment.html.twig b/agaric/templates/content/comment.html.twig
index 0fcacec..e310544 100644
--- a/agaric/templates/content/comment.html.twig
+++ b/agaric/templates/content/comment.html.twig
@@ -88,7 +88,7 @@
       server which comments are new for the user. Rendering the final "new"
       indicator here would break the render cache.
     #}
-    <mark class="hidden tag is-primary" data-comment-timestamp="{{ new_indicator_timestamp }}"></mark>
+    <mark class="hidden is-primary" data-comment-timestamp="{{ new_indicator_timestamp }}"></mark>
     <p><small>{{ permalink }}</small></p>
   </div>
   <div class="media-content">