diff --git a/templates/input/form-element.html.twig b/templates/input/form-element.html.twig
index 7d1d2e89181aad655eb6701059c9bf2773612e82..8e2cbd733c0b0248ff3db1754ed2c4ccab94956c 100644
--- a/templates/input/form-element.html.twig
+++ b/templates/input/form-element.html.twig
@@ -76,7 +76,7 @@
   {% endif %}
 
   {% if description_display == 'before' and description.content %}
-    <div{{ description.attributes }}>
+    <div{{ description.attributes.addClass(description_classes) }}>
       {{ description.content }}
     </div>
   {% endif %}