diff --git a/platform/micaz/Makefile.micaz b/platform/micaz/Makefile.micaz
index a0d6e30f8..6e269b488 100755
--- a/platform/micaz/Makefile.micaz
+++ b/platform/micaz/Makefile.micaz
@@ -7,7 +7,7 @@ SENSOR_BOARD_SOURCEFILES = mts300.c
 CONTIKI_TARGET_SOURCEFILES += adc.c rs232.c cfs-eeprom.c contiki-micaz-main.c \
                               leds-arch.c cc2420.c init-net.c node-id.c \
                               clock.c spi.c cc2420-arch.c rtimer-arch.c ds2401.c \
-                              battery-sensor.c  slip_uart0.c
+                              battery-sensor.c slip.c slip_uart0.c
 
 CONTIKI_TARGET_SOURCEFILES += $(SENSOR_BOARD_SOURCEFILES)