diff --git a/drivers/staging/comedi/drivers/pcl812.c b/drivers/staging/comedi/drivers/pcl812.c
index aefc1b849cf7..98112c79e2d7 100644
--- a/drivers/staging/comedi/drivers/pcl812.c
+++ b/drivers/staging/comedi/drivers/pcl812.c
@@ -1151,7 +1151,8 @@ static int pcl812_attach(struct comedi_device *dev, struct comedi_devconfig *it)
 		if (!dev->pacer)
 			return -ENOMEM;
 
-		if ((1 << it->options[1]) & board->irq_bits) {
+		if (it->options[1] > 0 && it->options[1] < 16 &&
+		    (1 << it->options[1]) & board->irq_bits) {
 			ret = request_irq(it->options[1], pcl812_interrupt, 0,
 					  dev->board_name, dev);
 			if (ret == 0)