diff --git a/avr/modules/flash/0BUILD b/avr/modules/flash/0BUILD
index cc5e850..64d9cef 100644
--- a/avr/modules/flash/0BUILD
+++ b/avr/modules/flash/0BUILD
@@ -7,6 +7,7 @@
     eeprom.asm
     flash1p.asm
     flash4p.asm
+    flashxp.asm
     flashprocess.asm
     io.asm
     io_attn.asm