diff --git a/drivers/iio/adc/stm32-adc.c b/drivers/iio/adc/stm32-adc.c
index 46106200bb86..5c5170b19b56 100644
--- a/drivers/iio/adc/stm32-adc.c
+++ b/drivers/iio/adc/stm32-adc.c
@@ -2443,15 +2443,7 @@ static int stm32_adc_chan_fw_init(struct iio_dev *indio_dev, bool timestamping)
 	scan_index = ret;
 
 	if (timestamping) {
-		struct iio_chan_spec *timestamp = &channels[scan_index];
-
-		timestamp->type = IIO_TIMESTAMP;
-		timestamp->channel = -1;
-		timestamp->scan_index = scan_index;
-		timestamp->scan_type.sign = 's';
-		timestamp->scan_type.realbits = 64;
-		timestamp->scan_type.storagebits = 64;
-
+		channels[scan_index] = IIO_CHAN_SOFT_TIMESTAMP(scan_index);
 		scan_index++;
 	}