diff --git a/drivers/rtc/rtc-at91sam9.c b/drivers/rtc/rtc-at91sam9.c
index 309b8b342d9c885ef544e53fc28688d988cd3573..59637430453226c0a7526c44bdba2a3b529030e6 100644
--- a/drivers/rtc/rtc-at91sam9.c
+++ b/drivers/rtc/rtc-at91sam9.c
@@ -24,7 +24,7 @@
 
 #include <mach/at91_rtt.h>
 #include <mach/cpu.h>
-
+#include <mach/hardware.h>
 
 /*
  * This driver uses two configurable hardware resources that live in the