diff --git a/drivers/staging/comedi/drivers/me4000.c b/drivers/staging/comedi/drivers/me4000.c
index 081a31004801..e4afca44b5e0 100644
--- a/drivers/staging/comedi/drivers/me4000.c
+++ b/drivers/staging/comedi/drivers/me4000.c
@@ -1105,7 +1105,7 @@ static irqreturn_t me4000_ai_isr(int irq, void *dev_id)
 {
 	unsigned int tmp;
 	struct comedi_device *dev = dev_id;
-	struct comedi_subdevice *s = &dev->subdevices[0];
+	struct comedi_subdevice *s = dev->read_subdev;
 	int i;
 	int c = 0;
 	unsigned int lval;