diff --git a/inc/Sitemapper.php b/inc/Sitemapper.php
index 52c71c545ad5fb975634581af33bd11d9a2379b4..47a3fedb5c0697276dbb0f5e98446bae2c2f8907 100644
--- a/inc/Sitemapper.php
+++ b/inc/Sitemapper.php
@@ -54,7 +54,9 @@ class Sitemapper {
             //skip hidden, non existing and restricted files
             if(isHiddenPage($id)) continue;
             if(auth_aclcheck($id,'','') < AUTH_READ) continue;
-            $items[] = SitemapItem::createFromID($id);
+            $item = SitemapItem::createFromID($id);
+            if ($item !== NULL)
+                $items[] = $item;
         }
 
         $eventData = array('items' => &$items, 'sitemap' => &$sitemap);