diff --git a/include/linux/gpio/gpio-reg.h b/include/linux/gpio/gpio-reg.h
index 39b888c40b39..3913b6660ed1 100644
--- a/include/linux/gpio/gpio-reg.h
+++ b/include/linux/gpio/gpio-reg.h
@@ -2,9 +2,13 @@
 #ifndef GPIO_REG_H
 #define GPIO_REG_H
 
+#include <linux/types.h>
+
 struct device;
 struct irq_domain;
 
+struct gpio_chip;
+
 struct gpio_chip *gpio_reg_init(struct device *dev, void __iomem *reg,
 	int base, int num, const char *label, u32 direction, u32 def_out,
 	const char *const *names, struct irq_domain *irqdom, const int *irqs);