diff --git a/drivers/i2c/busses/i2c-rk29.c b/drivers/i2c/busses/i2c-rk29.c
index 03715e2744c4..96bb9c93fa52 100755
--- a/drivers/i2c/busses/i2c-rk29.c
+++ b/drivers/i2c/busses/i2c-rk29.c
@@ -27,6 +27,7 @@
 #include <linux/delay.h>
 #include <linux/i2c.h>
 #include <linux/wakelock.h>
+#include <linux/slab.h>
 #include <mach/board.h>
 #include <asm/io.h>