diff --git a/dracut.sh b/dracut.sh
index 8d7ee70a..681a6b7a 100755
--- a/dracut.sh
+++ b/dracut.sh
@@ -1307,7 +1307,7 @@ export initdir dracutbasedir \
     dracutmodules force_add_dracutmodules add_dracutmodules omit_dracutmodules \
     mods_to_load \
     fw_dir drivers_dir debug no_kernel kernel_only \
-    omit_drivers mdadmconf lvmconf root_dev \
+    omit_drivers mdadmconf lvmconf root_devs \
     use_fstab fstab_lines libdirs fscks nofscks ro_mnt \
     stdloglvl sysloglvl fileloglvl kmsgloglvl logfile \
     debug host_fs_types host_devs swap_devs sshkey add_fstab \
diff --git a/modules.d/95rootfs-block/module-setup.sh b/modules.d/95rootfs-block/module-setup.sh
index 2b06bac2..987373b4 100755
--- a/modules.d/95rootfs-block/module-setup.sh
+++ b/modules.d/95rootfs-block/module-setup.sh
@@ -32,6 +32,12 @@ cmdline_journal() {
 cmdline_rootfs() {
     local _dev=/dev/block/$(find_root_block_device)
     local _fstype _flags _subvol
+
+    # "--no-hostonly-default-device" can result in empty root_devs
+    if [ "${#root_devs[@]}" -eq 0 ]; then
+        return
+    fi
+
     if [ -e $_dev ]; then
         printf " root=%s" "$(shorten_persistent_dev "$(get_persistent_dev "$_dev")")"
         _fstype="$(find_mp_fstype /)"