diff --git a/include/class.config.php b/include/class.config.php
index b2984fe46156389031351000389c09d85744c0a9..3ff7d1ef9787dfc58872fbe4f4f5ea79bb5b52c5 100644
--- a/include/class.config.php
+++ b/include/class.config.php
@@ -175,7 +175,7 @@ class OsticketConfig extends Config {
         return true;
     }
 
-    function lastModified() {
+    function lastModified($key=false) {
         return max(array_map(array('parent', 'lastModified'),
             array_keys($this->config)));
     }