diff --git a/plone/app/discussion/browser/comments.pt b/plone/app/discussion/browser/comments.pt
index 8e28a88..c192e7a 100644
--- a/plone/app/discussion/browser/comments.pt
+++ b/plone/app/discussion/browser/comments.pt
@@ -44,14 +44,14 @@
                                tal:attributes="href author_home_url">
                          <img src="defaultUser.gif"
                               alt=""
-                              border="0"
+                              class="defaultuserimg"
                               height="32"
                               tal:attributes="src portrait_url;
                                               alt reply/author_name" />
                     </a>
                     <img src="defaultUser.gif"
                          alt=""
-                         border="0"
+                         class="defaultuserimg"
                          height="32"
                          tal:condition="not: has_author_link"
                          tal:attributes="src portrait_url;
diff --git a/plone/app/discussion/browser/stylesheets/discussion.css b/plone/app/discussion/browser/stylesheets/discussion.css
index e777222..a8ca7a5 100644
--- a/plone/app/discussion/browser/stylesheets/discussion.css
+++ b/plone/app/discussion/browser/stylesheets/discussion.css
@@ -108,6 +108,9 @@
 .replyTreeLevel10 {
     margin-left: 10em;
 }
+.defaultuserimg {
+    border: 0;
+}
 
 
 /* Reply Form