diff -Naur genkernel-4.2.3.orig/defaults/initrd.scripts genkernel-4.2.3/defaults/initrd.scripts
--- genkernel-4.2.3.orig/defaults/initrd.scripts	2021-07-09 06:09:46.000000000 +0900
+++ genkernel-4.2.3/defaults/initrd.scripts	2021-07-13 21:57:48.241878750 +0900
@@ -1841,6 +1841,12 @@
 		exit 1
 	fi
 
+	if [ $2 -gt 0 ]
+	then
+		eval local LUKS_NAME="$1_$2"
+		eval local OPENED_LOCKFILE='"${CRYPT_'${TYPE}'_OPENED_LOCKFILE}_$2"'
+	fi
+
 	while true
 	do
 		# Reset cryptsetup_options on each iteration
@@ -2346,7 +2352,11 @@
 
 	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 "${REAL_ROOT}" ]
 		then
 			# Rescan volumes
@@ -2396,6 +2406,7 @@
 	write_env_file \
 		"${CRYPT_ENV_FILE}" \
 		CRYPT_ROOT \
+		CRYPT_ROOTS \
 		CRYPT_ROOT_OPTIONS \
 		CRYPT_SILENT \
 		CRYPT_SWAP \
diff -Naur genkernel-4.2.3.orig/defaults/linuxrc genkernel-4.2.3/defaults/linuxrc
--- genkernel-4.2.3.orig/defaults/linuxrc	2021-07-09 06:09:46.000000000 +0900
+++ genkernel-4.2.3/defaults/linuxrc	2021-07-13 21:57:48.241878750 +0900
@@ -214,8 +214,9 @@
 			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_root_options=*)