diff --git a/drivers/serial/serial_txx9.c b/drivers/serial/serial_txx9.c
index 1deb576..b8f91e0 100644
--- a/drivers/serial/serial_txx9.c
+++ b/drivers/serial/serial_txx9.c
@@ -1043,8 +1043,9 @@
 		ret = serial_txx9_register_port(&port);
 		if (ret < 0) {
 			dev_err(&dev->dev, "unable to register port at index %d "
-				"(IO%x MEM%lx IRQ%d): %d\n", i,
-				p->iobase, p->mapbase, p->irq, ret);
+				"(IO%x MEM%llx IRQ%d): %d\n", i,
+				p->iobase, (unsigned long long)p->mapbase,
+				p->irq, ret);
 		}
 	}
 	return 0;