diff --git a/alpine-install-on-disk.sh b/alpine-install-on-disk.sh
index 320499e..5fc48ff 100755
--- a/alpine-install-on-disk.sh
+++ b/alpine-install-on-disk.sh
@@ -50,6 +50,12 @@ sudo mount ${DISK}1 $rootfs_tmpdir
 # keep right permissions, use sudo
 sudo tar xf $IMAGE -C $rootfs_tmpdir
 
+# These are required by grub-install
+# And also for generating grub config that contains rootfstype
+for dir in dev proc sys; do
+    sudo mount --bind /${dir} ${rootfs_tmpdir}/${dir}
+done
+
 # Add SSH keys
 run_root mkdir -p root/.ssh
 sudo cp $SSH_KEYS $rootfs_tmpdir/root/.ssh/authorized_keys
@@ -94,11 +100,10 @@ alpine-unconfigured
 EOF
 
 # Setup bootloader
-for dir in dev proc sys; do
-    sudo mount --bind /${dir} ${rootfs_tmpdir}/${dir}
-done
 
 run_root apk add grub-bios
+echo 'GRUB_CMDLINE_LINUX_DEFAULT="quiet rootfstype=ext4"' >> ${rootfs_tmpdir}/etc/default/grub
+run_root grub-mkconfig -o /boot/grub/grub.cfg
 run_root grub-install --target=i386-pc ${DISK}
 
 # Cleanup