diff -Naur genkernel-4.0.9.orig/defaults/initrd.scripts genkernel-4.0.9/defaults/initrd.scripts
--- genkernel-4.0.9.orig/defaults/initrd.scripts	2020-06-24 03:44:22.000000000 +0900
+++ genkernel-4.0.9/defaults/initrd.scripts	2020-07-15 14:45:13.739085574 +0900
@@ -1769,6 +1769,12 @@
 	local DEV_ERROR=0 KEY_ERROR=0 KEYDEV_ERROR=0
 	local mntkey="/mnt/key/" crypt_filter_ret=
 
+	if [ $2 -gt 0 ]
+	then
+		eval local LUKS_NAME="$1_$2"
+		eval local OPENED_LOCKFILE='"${CRYPT_'${TYPE}'_OPENED_LOCKFILE}_$2"'
+	fi
+
 	while true
 	do
 		local cryptsetup_options=''
@@ -2264,7 +2270,11 @@
 
 	if [ -n "${CRYPT_ROOT}" ]
 	then
-		openLUKS "root"
+		local crypt_index=0
+		for CRYPT_ROOT in ${CRYPT_ROOTS}; do
+			openLUKS "root" ${crypt_index}
+			let crypt_index=${crypt_index}+1
+		done
 		if [ -n "${REAL_ROOT}" ]
 		then
 			# Rescan volumes
@@ -2314,6 +2324,7 @@
 	write_env_file \
 		"${CRYPT_ENV_FILE}" \
 		CRYPT_ROOT \
+		CRYPT_ROOTS \
 		CRYPT_ROOT_TRIM \
 		CRYPT_SILENT \
 		CRYPT_SWAP
diff -Naur genkernel-4.0.9.orig/defaults/linuxrc genkernel-4.0.9/defaults/linuxrc
--- genkernel-4.0.9.orig/defaults/linuxrc	2020-06-24 03:44:22.000000000 +0900
+++ genkernel-4.0.9/defaults/linuxrc	2020-07-15 15:04:24.129541019 +0900
@@ -244,8 +244,9 @@
 			ISCSI_NOIBFT=1
 		;;
 		# Crypto
-		crypt_root=*)
-			CRYPT_ROOT=${x#*=}
+		crypt_root=*|crypt_roots=*)
+			CRYPT_ROOT=${CRYPT_ROOT:=${x#*=}}
+			CRYPT_ROOTS="${CRYPT_ROOTS} ${x#*=}"
 			USE_CRYPTSETUP=1
 		;;
 		crypt_swap=*)