diff --git a/cpu/atmega32u4/Makefile b/cpu/atmega32u4/Makefile
index b9e4566..ce25179 100755
--- a/cpu/atmega32u4/Makefile
+++ b/cpu/atmega32u4/Makefile
@@ -1,2 +1,2 @@
-SUBS+=avr/core avr/usart/at90 avr/usb cpu/timer/at90timer0
 
+DEPENDS+=../../core ../../usart/at90 ../../timer/at90timer0 ../../usb