diff --git a/backup/controller/restore_controller.class.php b/backup/controller/restore_controller.class.php
index 61fdfb03d04..11430238b82 100644
--- a/backup/controller/restore_controller.class.php
+++ b/backup/controller/restore_controller.class.php
@@ -343,6 +343,7 @@ class restore_controller extends base_controller {
      * is called during restore, but not directly part of the restore system, may
      * need to behave differently during restore (e.g. do not bother resetting a
      * cache because we know it will be reset at end of operation).
+     * @since Moodle 2.6.3
      *
      * @return bool True if any restore is currently executing
      */