diff --git a/drivers/rtc/rtc-at91sam9.c b/drivers/rtc/rtc-at91sam9.c
index 78a018b..f677e07 100644
--- a/drivers/rtc/rtc-at91sam9.c
+++ b/drivers/rtc/rtc-at91sam9.c
@@ -18,6 +18,7 @@
 #include <linux/rtc.h>
 #include <linux/interrupt.h>
 #include <linux/ioctl.h>
+#include <linux/slab.h>
 
 #include <mach/board.h>
 #include <mach/at91_rtt.h>