diff --git a/firmware/Makefile b/firmware/Makefile
index d98f001..26d425a 100644
--- a/firmware/Makefile
+++ b/firmware/Makefile
@@ -42,7 +42,7 @@ program:	all
 fuses:
 	# - enable crystal
 	# - disable JTAG, so we can fully use PORTC
-	$(AVRDUDE) -U lfuse:w:0xCF:m -U hfuse:w:0xD9:m
+	$(AVRDUDE) -U lfuse:w:0xCF:m -U hfuse:w:0xD8:m
 
 clean:
 	rm -f main.hex main.lst main.obj main.cof main.list main.map main.eep.hex main.bin *.o usbdrv/*.o main.s usbdrv/oddebug.s usbdrv/usbdrv.s