diff --git a/opentech/apply/activity/templates/activity/include/comment_form.html b/opentech/apply/activity/templates/activity/include/comment_form.html
index c20300aec2bd4315b05c7d672885b34c9c9e602d..57287e67938d2f3965d654f140eab7084d56f47f 100644
--- a/opentech/apply/activity/templates/activity/include/comment_form.html
+++ b/opentech/apply/activity/templates/activity/include/comment_form.html
@@ -1,5 +1,6 @@
-<form method="post" id="comment-form">
+<h4>Add communication</h4>
+<form class="form form--comments" method="post" id="comment-form">
     {% csrf_token %}
     {{ comment_form }}
-    <input id="comment-form-submit" name="form-submitted" type="submit" form="comment-form" value="Comment">
+    <button id="comment-form-submit" name="form-submitted" form="comment-form" class="button button--primary" type="submit" value="comment">Add message</button>
 </form>