diff --git a/drivers/iio/chemical/bme680_core.c b/drivers/iio/chemical/bme680_core.c
index 2c40c13fe97a..812829841733 100644
--- a/drivers/iio/chemical/bme680_core.c
+++ b/drivers/iio/chemical/bme680_core.c
@@ -38,7 +38,7 @@ struct bme680_calib {
 	s8  par_h3;
 	s8  par_h4;
 	s8  par_h5;
-	s8  par_h6;
+	u8  par_h6;
 	s8  par_h7;
 	s8  par_gh1;
 	s16 par_gh2;