diff --git a/drivers/iio/light/gp2ap002.c b/drivers/iio/light/gp2ap002.c
index 7125e011a38ae80ed2bd1cfdcf8add076f5df20d..f8b1d7dd6f5fc69da12cf37ad286112555e4919f 100644
--- a/drivers/iio/light/gp2ap002.c
+++ b/drivers/iio/light/gp2ap002.c
@@ -420,7 +420,7 @@ static int gp2ap002_regmap_i2c_write(void *context, unsigned int reg,
 	return i2c_smbus_write_byte_data(i2c, reg, val);
 }
 
-static struct regmap_bus gp2ap002_regmap_bus = {
+static const struct regmap_bus gp2ap002_regmap_bus = {
 	.reg_read = gp2ap002_regmap_i2c_read,
 	.reg_write = gp2ap002_regmap_i2c_write,
 };