diff --git a/9.MediaVault/1.Install_MediaVault/0_setup.py b/9.MediaVault/1.Install_MediaVault/0_setup.py
index f2e2c9420b7277699131dfac47cb96ab848aabb1..8d489589327e1e3b7eab02a4b4ba552f6fddcb57 100755
--- a/9.MediaVault/1.Install_MediaVault/0_setup.py
+++ b/9.MediaVault/1.Install_MediaVault/0_setup.py
@@ -11,11 +11,12 @@ def setup(interactive=True):
 0 22 * * * root /usr/local/sbin/rsync_tmbackup.sh /etc root@{backup_server}:/backup/{hostname}/etc /etc/backup/excluded_patterns.txt
 0 22 * * * root flock -n /etc/backup/home_backup.lock /usr/local/sbin/rsync_tmbackup.sh /home root@{backup_server}:/backup/{hostname}/home /etc/backup/excluded_patterns.txt'''
 
+    # crontab files can only contain lowercase and dashes, no _ or .
     cmds = [
         'cp rsync_tmbackup.sh /usr/local/sbin',
         'mkdir -p /etc/backup',
         'cp excluded_patterns.txt /etc/backup',
-        'cp /tmp/backup.cron /etc/cron.d/',
+        'cp /tmp/backup.cron /etc/cron.d/backup',
     ]
 
     server = utils.get_conf('BACKUP_SERVER', '')