1 files changed, 2 insertions, 1 deletions
diff --git a/ws.php b/ws.php
index 702ff769a..947adcbbd 100644
--- a/ws.php
+++ b/ws.php
@@ -257,7 +257,8 @@ function ws_addDefaultMethods( $arr )
     'pwg.images.exist',
     'ws_images_exist',
     array(
-      'md5sum_list'=> array(),
+      'md5sum_list'=> array('default' => null),
+      'filename_list' => array('default' => null),
       ),
     'check existence of a photo list'
     );