diff --git a/scripts/contrib/mkefidisk.sh b/scripts/contrib/mkefidisk.sh
index 800733f0af..ac4ec9c7fb 100755
--- a/scripts/contrib/mkefidisk.sh
+++ b/scripts/contrib/mkefidisk.sh
@@ -444,7 +444,7 @@ if [ -d $ROOTFS_MNT/etc/udev/ ] ; then
 fi
 
 # Add startup.nsh script for automated boot
-echo "fs0:\EFI\BOOT\bootx64.efi" > $BOOTFS_MNT/startup.nsh
+printf "fs0:\%s\BOOT\%s\n" "EFI" "bootx64.efi" > $BOOTFS_MNT/startup.nsh
 
 
 # Call cleanup to unmount devices and images and remove the TMPDIR