diff --git a/README.md b/README.md
index d17c0d9..dc94d01 100644
--- a/README.md
+++ b/README.md
@@ -33,7 +33,7 @@ nano preinstall2.sh
 # Edit adapter name for dhcpcd service in script
 sh preinstall2.sh
 exit
-umount -r /mnt
+umount -R /mnt
 ```
 
 ### After First Boot
diff --git a/preinstall2.sh b/preinstall2.sh
index abf3b13..239196c 100644
--- a/preinstall2.sh
+++ b/preinstall2.sh
@@ -35,7 +35,7 @@ echo "title Arch" > /boot/loader/entries/arch.conf
 echo "linux /vmlinuz-linux" >> /boot/loader/entries/arch.conf
 echo "initrd /initramfs-linux.img" >> /boot/loader/entries/arch.conf
 
-echo "options root=PARTUUID=$(blkid -S PARTUUID -o value /dev/sda3) rw" >> /boot/loader/entries/arch.conf
+echo "options root=PARTUUID=$(blkid -s PARTUUID -o value /dev/sda3) rw" >> /boot/loader/entries/arch.conf
 
 # install dhcpd service