#3131 RSS feed XML isn't validating

inc/classes/BxDolRssFactory.php

@@ -94,7 +94,7 @@ class BxDolRssFactory extends BxDol
             $sRSSImage = "<image><url>{$sImage}</url><title>{$sRSSTitle}</title><link>{$sMainLink}</link></image>";
         }
 
-        return "<?xml version=\"1.0\" encoding=\"UTF-8\"?><rss version=\"2.0\"><channel><title>{$sRSSTitle}</title><link><![CDATA[{$sMainLink}]]></link><description>{$sRSSTitle}</description><lastBuildDate>{$sRSSLast}</lastBuildDate>{$sRSSImage}{$sUnitRSSFeed}</channel></rss>";
+        return "<?xml version=\"1.0\" encoding=\"UTF-8\"?><rss version=\"2.0\" xmlns:atom=\"http://www.w3.org/2005/Atom\"><channel><title>{$sRSSTitle}</title><link><![CDATA[{$sMainLink}]]></link><atom:link href=\"{$sMainLink}\" rel=\"self\" type=\"application/rss+xml\" /><description>{$sRSSTitle}</description><lastBuildDate>{$sRSSLast}</lastBuildDate>{$sRSSImage}{$sUnitRSSFeed}</channel></rss>";
     }
 
 }