diff --git a/arch/powerpc/sysdev/ppc4xx_gpio.c b/arch/powerpc/sysdev/ppc4xx_gpio.c
index 110efe2..3812fc3 100644
--- a/arch/powerpc/sysdev/ppc4xx_gpio.c
+++ b/arch/powerpc/sysdev/ppc4xx_gpio.c
@@ -29,6 +29,7 @@
 #include <linux/of_gpio.h>
 #include <linux/gpio.h>
 #include <linux/types.h>
+#include <linux/slab.h>
 
 #define GPIO_MASK(gpio)		(0x80000000 >> (gpio))
 #define GPIO_MASK2(gpio)	(0xc0000000 >> ((gpio) * 2))