diff --git a/drivers/iio/adc/ad7266.c b/drivers/iio/adc/ad7266.c
index bdac020045b4..88f39533f249 100644
--- a/drivers/iio/adc/ad7266.c
+++ b/drivers/iio/adc/ad7266.c
@@ -123,7 +123,8 @@ static int ad7266_update_scan_mode(struct iio_dev *indio_dev,
 	const unsigned long *scan_mask)
 {
 	struct ad7266_state *st = iio_priv(indio_dev);
-	unsigned int nr = find_first_bit(scan_mask, indio_dev->masklength);
+	unsigned int nr = find_first_bit(scan_mask,
+					 iio_get_masklength(indio_dev));
 
 	ad7266_select_input(st, nr);