diff --git a/classes/Tools.php b/classes/Tools.php
index fab8c7385..558f13c52 100644
--- a/classes/Tools.php
+++ b/classes/Tools.php
@@ -2127,6 +2127,9 @@ exit;
 		}
 	}
 
+	/**
+	* @deprecated as of 1.5 use Controller::getController('PageNotFoundController')->run();
+   	*/
 	public static function display404Error()
 	{
 		header('HTTP/1.1 404 Not Found');