diff --git a/drivers/rtc/rtc-ds1390.c b/drivers/rtc/rtc-ds1390.c
index cdb7050..26a86d2 100644
--- a/drivers/rtc/rtc-ds1390.c
+++ b/drivers/rtc/rtc-ds1390.c
@@ -19,6 +19,7 @@
 #include <linux/rtc.h>
 #include <linux/spi/spi.h>
 #include <linux/bcd.h>
+#include <linux/slab.h>
 
 #define DS1390_REG_100THS		0x00
 #define DS1390_REG_SECONDS		0x01