diff --git a/script/void-kaiten-yaki.sh b/script/void-kaiten-yaki.sh
index ee65a2c..3360fe5 100644
--- a/script/void-kaiten-yaki.sh
+++ b/script/void-kaiten-yaki.sh
@@ -182,6 +182,13 @@ else
 	lvcreate -l ${LVROOTSIZE} -n ${LVROOTNAME} ${VGNAME}
 fi	# if the root volun already exist
 
+# ADD "rd.auto=1 cryptdevice=/dev/sda2:${LUKS_NAME} root=/dev/mapper/${VGNAME}-${ROOTNAME}" to GRUB.
+# This is magical part. I have not understood why this is required. 
+# Anyway, without this modification, Void Linux doesn't boot. 
+# Refer https://wiki.voidlinux.org/Install_LVM_LUKS#Installation_using_void-installer
+echo "...Modify /etc/default/grub."
+sed -i "s#loglevel=4#loglevel=4 rd.auto=1 cryptdevice=/dev/sda2:${LUKS_NAME} root=/dev/mapper/${VGNAME}-${LVROOTNAME}#" /etc/default/grub
+
 # ******************************************************************************* 
 #                                Para-install stage 
 # *******************************************************************************