diff --git a/Makefile b/Makefile
index cae251b..f91d805 100644
--- a/Makefile
+++ b/Makefile
@@ -40,8 +40,8 @@ SOURCES = $(PROGRAM).c serial.c dda.c gcode_parse.c gcode_process.c timer.c temp
 ##############################################################################
 
 #MCU_TARGET = atmega168
-MCU_TARGET = atmega328p
-#MCU_TARGET = atmega644p
+# MCU_TARGET = atmega328p
+MCU_TARGET = atmega644p
 #MCU_TARGET = atmega1280
 F_CPU = 16000000L