diff --git a/avr/devices/n21/boot/boot.asm b/avr/devices/n21/boot/boot.asm
index 4468a99..589a736 100644
--- a/avr/devices/n21/boot/boot.asm
+++ b/avr/devices/n21/boot/boot.asm
@@ -114,6 +114,7 @@ main:
 .include "modules/flash/io_attn.asm"
 .include "modules/flash/io_bitbang.asm"
 .include "modules/flash/flash1p.asm"
+.include "modules/flash/flashxp.asm"
 .include "modules/flash/flashprocess.asm"
 .include "modules/flash/wait.asm"
 .include "modules/bootloader/main.asm"