diff --git a/backup/backup.php b/backup/backup.php
index 6aceeebbbee..514523d679d 100644
--- a/backup/backup.php
+++ b/backup/backup.php
@@ -8,6 +8,8 @@
     require_once ("backuplib.php");
 
     optional_variable($id);       // course id
+    optional_variable($cancel);
+    optional_variable($launch);
 
     require_login();
 
diff --git a/backup/restore.php b/backup/restore.php
index 00edb182b76..a6d9f9942a7 100644
--- a/backup/restore.php
+++ b/backup/restore.php
@@ -13,6 +13,8 @@
     //Optional
     optional_variable($id);
     optional_variable($file);
+    optional_variable($cancel);
+    optional_variable($launch);
 
     //Check login       
     require_login();