diff --git a/phpBB/styles/prosilver/template/ajax.js b/phpBB/styles/prosilver/template/ajax.js
index 1bb3aabb9b..6903ad2261 100644
--- a/phpBB/styles/prosilver/template/ajax.js
+++ b/phpBB/styles/prosilver/template/ajax.js
@@ -26,7 +26,7 @@ phpbb.addAjaxCallback('mark_forums_read', function(res) {
 	});
 
 	// Mark subforums read
-	$('a.subforum[class*="unread"]').removeClass('unread').addClass('read');
+	$('a.subforum[class*="unread"]').removeClass('unread').addClass('read').children('.icon.icon-red').removeClass('icon-red').addClass('icon-blue');
 
 	// Mark topics read if we are watching a category and showing active topics
 	if ($('#active_topics').length) {