--- safehtml.module	2008-05-09 13:16:07.000000000 +0200
+++ safehtml0.module	2008-05-09 13:20:32.000000000 +0200
@@ -81,10 +81,11 @@ function safehtml_nodeapi(&$node, $op, $
   if ($op == 'submit') {
     $arr = array_keys(filter_list_format($node->format));
     if (in_array('safehtml/0', $arr)) {
+    	$path = drupal_get_path('module', 'safehtml');
       if (!defined('XML_HTMLSAX3')) {
-          define('XML_HTMLSAX3', '');
+          define('XML_HTMLSAX3', "./$path/classes/");
       }
-      require_once('classes/safehtml.php');
+      require_once("./$path/classes/safehtml.php");
       if ($node->body) {
         $node->body = _safehtml_parse($node->body, $node->format);
       }