diff --git a/drivers/parport/parport_serial.c b/drivers/parport/parport_serial.c
index 76dd077e3184f7ed85f3a78de3c8c66a29753199..166de3507780f65c7354ebf4c9548c558baf3d00 100644
--- a/drivers/parport/parport_serial.c
+++ b/drivers/parport/parport_serial.c
@@ -329,9 +329,9 @@ static int __devinit parport_register (struct pci_dev *dev,
 
 		if (priv->num_par == ARRAY_SIZE (priv->port)) {
 			printk (KERN_WARNING
-				"parport_serial: %s: only %u parallel ports "
+				"parport_serial: %s: only %zu parallel ports "
 				"supported (%d reported)\n", pci_name (dev),
-				ARRAY_SIZE (priv->port), card->numports);
+				ARRAY_SIZE(priv->port), card->numports);
 			break;
 		}