diff --git a/admin/albums.php b/admin/albums.php
index 8583e55fc..94890bdf0 100644
--- a/admin/albums.php
+++ b/admin/albums.php
@@ -197,7 +197,7 @@ function cmpCat($a, $b)
 
 function assocToOrderedTree($assocT) 
 {
-  global $nb_photos_in, $nb_sub_photos;
+  global $nb_photos_in, $nb_sub_photos, $is_forbidden;
 
   $orderedTree = array();