diff --git a/lfs/flash-images b/lfs/flash-images
index f2ac6a34a..79fa75ba8 100644
--- a/lfs/flash-images
+++ b/lfs/flash-images
@@ -163,6 +163,9 @@ ifeq "$(BOOTLOADER)" "grub"
 	mkdir -pv $(MNThdd)/boot/grub
 	chroot $(MNThdd) grub-mkconfig -o /boot/grub/grub.cfg
 
+	# Boot the first kernel by default
+	chroot $(MNThdd) grub-set-default 0
+
 	# Insert the UUID because grub-mkconfig often fails to
 	# detect that correctly
 	sed -i $(MNThdd)/boot/grub/grub.cfg \