diff --git a/drivers/hwmon/nct6775.c b/drivers/hwmon/nct6775.c
index 155d4d1d1585..f9d1349c3286 100644
--- a/drivers/hwmon/nct6775.c
+++ b/drivers/hwmon/nct6775.c
@@ -4175,7 +4175,7 @@ static int nct6775_probe(struct platform_device *pdev)
 	 * The temperature is already monitored if the respective bit in <mask>
 	 * is set.
 	 */
-	for (i = 0; i < 32; i++) {
+	for (i = 0; i < 31; i++) {
 		if (!(data->temp_mask & BIT(i + 1)))
 			continue;
 		if (!reg_temp_alternate[i])