diff --git a/html/inc/sanitize_html.inc b/html/inc/sanitize_html.inc
index 968c5dd225..5001fcd16f 100644
--- a/html/inc/sanitize_html.inc
+++ b/html/inc/sanitize_html.inc
@@ -13,7 +13,9 @@ $allowed = array(
     'ol' => array(),
     'li' => array(),
     'pre' => array(),
-    'img' => array('src' => 1, 'border' => 1, 'height' => array('maxval' => 450))
+    'img' => array('src' => 1, 'border' => 1, 'height' => array('maxval' => 450)),
+    'blockquote' => array(),
+    'u' => array()
 );