diff --git a/drivers/iio/adc/stm32-adc.c b/drivers/iio/adc/stm32-adc.c
index 80e333f65ddd2a9267cc475b038a53ab12716cd6..3985fe9728923c919206af6f3ac668d91badcbbb 100644
--- a/drivers/iio/adc/stm32-adc.c
+++ b/drivers/iio/adc/stm32-adc.c
@@ -1019,6 +1019,9 @@ static int stm32h7_adc_selfcalib(struct iio_dev *indio_dev)
 	if (adc->cal.calibrated)
 		return true;
 
+	/* ADC must be disabled for calibration */
+	stm32h7_adc_disable(indio_dev);
+
 	/*
 	 * Select calibration mode:
 	 * - Offset calibration for single ended inputs