diff --git a/drivers/comedi/drivers/adq12b.c b/drivers/comedi/drivers/adq12b.c
index 19d765182006..f8fa5c6ecdff 100644
--- a/drivers/comedi/drivers/adq12b.c
+++ b/drivers/comedi/drivers/adq12b.c
@@ -179,7 +179,8 @@ static int adq12b_attach(struct comedi_device *dev, struct comedi_devconfig *it)
 	struct comedi_subdevice *s;
 	int ret;
 
-	ret = comedi_request_region(dev, it->options[0], 0x10);
+	ret = comedi_check_request_region(dev, it->options[0], 0x10,
+					  0x300, 0x3af, 0x20);
 	if (ret)
 		return ret;