diff --git a/inc/media.php b/inc/media.php
index fc377c8c7eaf00f7a9d218248e43c5bc382e1a22..9022858e1599095d49f17c4f35b9a2b0eafae3fc 100644
--- a/inc/media.php
+++ b/inc/media.php
@@ -212,7 +212,7 @@ define('DOKU_MEDIA_EMPTY_NS', 8);
  */
 function media_delete($id,$auth){
     global $lang;
-    $auth = auth_quickaclcheck($id);
+    $auth = auth_quickaclcheck(ltrim(getNS($id).':*', ':'));
     if($auth < AUTH_DELETE) return DOKU_MEDIA_NOT_AUTH;
     if(media_inuse($id)) return DOKU_MEDIA_INUSE;