diff --git a/drivers/comedi/drivers/dt2814.c b/drivers/comedi/drivers/dt2814.c
index caec16482afb..63b7f17691ff 100644
--- a/drivers/comedi/drivers/dt2814.c
+++ b/drivers/comedi/drivers/dt2814.c
@@ -316,7 +316,8 @@ static int dt2814_attach(struct comedi_device *dev, struct comedi_devconfig *it)
 		return -EIO;
 	}
 
-	if (it->options[1]) {
+	/* only ISA interrupts are valid on this board */
+	if (it->options[1] >= 1 && it->options[1] <= 15) {
 		ret = request_irq(it->options[1], dt2814_interrupt, 0,
 				  dev->board_name, dev);
 		if (ret == 0)