diff --git a/drivers/comedi/drivers/dac02.c b/drivers/comedi/drivers/dac02.c
index 4b011d66d7b0..2c04472c5078 100644
--- a/drivers/comedi/drivers/dac02.c
+++ b/drivers/comedi/drivers/dac02.c
@@ -103,7 +103,8 @@ static int dac02_attach(struct comedi_device *dev, struct comedi_devconfig *it)
 	struct comedi_subdevice *s;
 	int ret;
 
-	ret = comedi_request_region(dev, it->options[0], 0x08);
+	ret = comedi_check_request_region(dev, it->options[0], 0x08,
+					  0x200, 0x3ff, 8);
 	if (ret)
 		return ret;