diff --git a/drivers/iio/light/stk3310.c b/drivers/iio/light/stk3310.c
index 185c24a75ae6..9d1e503bc958 100644
--- a/drivers/iio/light/stk3310.c
+++ b/drivers/iio/light/stk3310.c
@@ -487,7 +487,7 @@ static bool stk3310_is_volatile_reg(struct device *dev, unsigned int reg)
 	}
 }
 
-static struct regmap_config stk3310_regmap_config = {
+static const struct regmap_config stk3310_regmap_config = {
 	.name = STK3310_REGMAP_NAME,
 	.reg_bits = 8,
 	.val_bits = 8,