diff --git a/drivers/mfd/axp20x.c b/drivers/mfd/axp20x.c
index 971b0eb..c522ee2 100644
--- a/drivers/mfd/axp20x.c
+++ b/drivers/mfd/axp20x.c
@@ -236,7 +236,7 @@
 };
 MODULE_DEVICE_TABLE(i2c, axp20x_i2c_id);
 
-static struct acpi_device_id axp20x_acpi_match[] = {
+static const struct acpi_device_id axp20x_acpi_match[] = {
 	{
 		.id = "INT33F4",
 		.driver_data = AXP288_ID,