diff --git a/drivers/serial/serial_txx9.c b/drivers/serial/serial_txx9.c
index 8fcb4c5..7313c2e 100644
--- a/drivers/serial/serial_txx9.c
+++ b/drivers/serial/serial_txx9.c
@@ -1039,7 +1039,7 @@
 		ret = serial_txx9_register_port(&port);
 		if (ret < 0) {
 			dev_err(&dev->dev, "unable to register port at index %d "
-				"(IO%x MEM%llx IRQ%d): %d\n", i,
+				"(IO%lx MEM%llx IRQ%d): %d\n", i,
 				p->iobase, (unsigned long long)p->mapbase,
 				p->irq, ret);
 		}