diff --git a/imagebuilder/kiosk.ks b/imagebuilder/kiosk.ks
index 31ce460..2a91918 100644
--- a/imagebuilder/kiosk.ks
+++ b/imagebuilder/kiosk.ks
@@ -1,6 +1,6 @@
 lang fr_FR.UTF-8
 keyboard fr
-timezone UTC --isUtc --ntpservers=rhel.pool.ntp.org
+timezone UTC --utc --ntpservers=rhel.pool.ntp.org
 reboot
 text