diff --git a/hyperfi b/hyperfi
index 428387d..5e05823 100644
--- a/hyperfi
+++ b/hyperfi
@@ -1372,8 +1372,8 @@ archgrubinstall(){
     if [ "${luksroot}" = "1" ]; then
         if (whiptail --backtitle "${apptitle}" --title "${txtinstall//%1/grub}" --yesno "${txtgrubluksdetected}" 0 0) ; then
            clear
-           echo "sed -i /GRUB_CMDLINE_LINUX=/c\GRUB_CMDLINE_LINUX=\\\"cryptdevice=/dev/disk/by-uuid/${luksrootuuid}:root\\\" /mnt/etc/default/grub"
-           sed -i /GRUB_CMDLINE_LINUX=/c\GRUB_CMDLINE_LINUX=\"cryptdevice=/dev/disk/by-uuid/${luksrootuuid}:root\" /mnt/etc/default/grub
+           echo "sed -e \"s|GRUB_CMDLINE_LINUX=\\\"\\\"|GRUB_CMDLINE_LINUX=\\\"cryptdevice=/dev/disk/by-uuid/${luksrootuuid}:root\\\"|g\" -i /mnt/etc/default/grub"
+           sed -e "s|GRUB_CMDLINE_LINUX=\"\"|GRUB_CMDLINE_LINUX=\"cryptdevice=/dev/disk/by-uuid/${luksrootuuid}:root\"|g" -i /mnt/etc/default/grub
            pressanykey
         fi
     fi