diff --git a/backup.md b/backup.md
index 0ba09f01..90815438 100644
--- a/backup.md
+++ b/backup.md
@@ -133,7 +133,7 @@ yunohost backup create --apps wordpress
 then make it executable : 
 
 ```bash
-chown +x /etc/cron.weekly/backup-wordpress
+chmod +x /etc/cron.weekly/backup-wordpress
 ```
 
 Be careful what you backup exactly and when : you don't want to end up with your whole disk space saturated because you backuped 30 Go of data every day.