diff --git a/sys/arm/at91/files.at91 b/sys/arm/at91/files.at91
index 0ffb2cb7d115..1cdb61341da6 100644
--- a/sys/arm/at91/files.at91
+++ b/sys/arm/at91/files.at91
@@ -8,7 +8,9 @@ arm/at91/at91_pio.c		standard
 arm/at91/at91_pmc.c		standard
 arm/at91/at91_rtc.c		standard
 arm/at91/at91_ssc.c		optional	at91_ssc
-arm/at91/at91_spi.c		optional	at91_spi
+arm/at91/at91_spi.c		optional	at91_spi		\
+	dependency	"spibus_if.h"
+arm/at91/at91_tc.c		optional	at91_tc
 arm/at91/at91_twi.c		optional	at91_twi
 arm/at91/at91_udp.c		optional	at91_udp
 arm/at91/if_ate.c		optional	ate