diff --git a/drivers/iio/pressure/bmp280-core.c b/drivers/iio/pressure/bmp280-core.c
index 1066792b9087..3940b8e61a06 100644
--- a/drivers/iio/pressure/bmp280-core.c
+++ b/drivers/iio/pressure/bmp280-core.c
@@ -839,7 +839,7 @@ static int bmp280_write_sampling_frequency(struct bmp280_data *data,
 					   int val, int val2)
 {
 	const int (*avail)[2] = data->chip_info->sampling_freq_avail;
-	const int n = data->chip_info->num_sampling_freq_avail;
+	const int n = data->chip_info->num_sampling_freq_avail / 2;
 	int ret, prev;
 	int i;