diff --git a/include/linux/i2c/adp5588.h b/include/linux/i2c/adp5588.h
index bec05ed2176617c5417687860ee23e305498566f..3c5d6b6e765c22b06f6125a606eef9b5107958aa 100644
--- a/include/linux/i2c/adp5588.h
+++ b/include/linux/i2c/adp5588.h
@@ -140,6 +140,8 @@ struct adp5588_kpad_platform_data {
 	const struct adp5588_gpio_platform_data *gpio_data;
 };
 
+struct i2c_client; /* forward declaration */
+
 struct adp5588_gpio_platform_data {
 	int gpio_start;		/* GPIO Chip base # */
 	unsigned irq_base;	/* interrupt base # */