diff --git a/action.php b/action.php
index 7e3c5fb..dc32929 100644
--- a/action.php
+++ b/action.php
@@ -5,7 +5,7 @@
 
   class action_plugin_legalnotice extends DokuWiki_Action_Plugin {
 
-  function register(&$controller) {
+  function register(Doku_Event_Handler $controller) {
       $controller->register_hook('TPL_ACT_RENDER', 'AFTER',  $this, 'legalnotice');
     }