diff --git a/drivers/mfd/sm501.c b/drivers/mfd/sm501.c
index d5e34a5eb250..154270f8d8d7 100644
--- a/drivers/mfd/sm501.c
+++ b/drivers/mfd/sm501.c
@@ -17,6 +17,7 @@
 #include <linux/platform_device.h>
 #include <linux/pci.h>
 #include <linux/platform_data/i2c-gpio.h>
+#include <linux/gpio/driver.h>
 #include <linux/gpio/machine.h>
 #include <linux/slab.h>