diff --git a/drivers/rtc/rtc-ds1511.c b/drivers/rtc/rtc-ds1511.c
index 4166b84..06b8566 100644
--- a/drivers/rtc/rtc-ds1511.c
+++ b/drivers/rtc/rtc-ds1511.c
@@ -17,6 +17,7 @@
 #include <linux/bcd.h>
 #include <linux/init.h>
 #include <linux/kernel.h>
+#include <linux/gfp.h>
 #include <linux/delay.h>
 #include <linux/interrupt.h>
 #include <linux/rtc.h>