diff --git a/doc/raketasks/backup_restore.md b/doc/raketasks/backup_restore.md
index c1cfa7d6976e95714720b0f753118569244873eb..348896cd5de46ddba2aec169fb58f1715a34909b 100644
--- a/doc/raketasks/backup_restore.md
+++ b/doc/raketasks/backup_restore.md
@@ -67,6 +67,7 @@ The available options are:
 * `artifacts` (CI build artifacts)
 * `lfs` (LFS objects)
 * `pages` (pages content)
+* `registry` (registry containers)
 
 Use a comma to specify several options at the same time: