diff --git a/drivers/hwmon/max6697.c b/drivers/hwmon/max6697.c
index 6df28fe0577d..7e7f59c68ce6 100644
--- a/drivers/hwmon/max6697.c
+++ b/drivers/hwmon/max6697.c
@@ -314,6 +314,7 @@ static ssize_t set_temp(struct device *dev,
 		return ret;
 
 	mutex_lock(&data->update_lock);
+	temp = clamp_val(temp, -1000000, 1000000);	/* prevent underflow */
 	temp = DIV_ROUND_CLOSEST(temp, 1000) + data->temp_offset;
 	temp = clamp_val(temp, 0, data->type == max6581 ? 255 : 127);
 	data->temp[nr][index] = temp;