diff --git a/drivers/comedi/drivers/dt2801.c b/drivers/comedi/drivers/dt2801.c
index 230d25010f58..d790e69f98a0 100644
--- a/drivers/comedi/drivers/dt2801.c
+++ b/drivers/comedi/drivers/dt2801.c
@@ -540,7 +540,8 @@ static int dt2801_attach(struct comedi_device *dev, struct comedi_devconfig *it)
 	int ret = 0;
 	int n_ai_chans;
 
-	ret = comedi_request_region(dev, it->options[0], 0x2);
+	ret = comedi_check_request_region(dev, it->options[0], 0x2,
+					  0x200, 0x3ff, 2);
 	if (ret)
 		return ret;