diff --git a/templates/content/node--islandora-object.html.twig b/templates/content/node--islandora-object.html.twig
index de21130..56d8530 100755
--- a/templates/content/node--islandora-object.html.twig
+++ b/templates/content/node--islandora-object.html.twig
@@ -12,7 +12,7 @@ view_mode ? 'node--view-mode-' ~ view_mode|clean_class,
 ]
 %}
 <details>
-  <summary class="button">About</summary>
+  <summary class="about button">About</summary>
   <article{{ attributes.addClass(classes) }}>
     <header class="{{ layout }}">
       {{ title_prefix }}