diff --git a/doc/raketasks/backup_restore.md b/doc/raketasks/backup_restore.md
index f9d2f5dc4eb488ee3e7cb643c781661f3f0ce4f8..6d31388baeefe0885a8db6eb043cae686cbf7b16 100644
--- a/doc/raketasks/backup_restore.md
+++ b/doc/raketasks/backup_restore.md
@@ -155,6 +155,7 @@ Options:
 
 ```
 BACKUP=timestamp_of_backup (required if more than one backup exists)
+force=yes (do not ask if the authorized_keys file should get regenerated)
 ```
 
 Example output: