diff --git a/en_US.ISO8859-1/books/arch-handbook/pci/chapter.xml b/en_US.ISO8859-1/books/arch-handbook/pci/chapter.xml
index a35983eff2..851e32ce5b 100644
--- a/en_US.ISO8859-1/books/arch-handbook/pci/chapter.xml
+++ b/en_US.ISO8859-1/books/arch-handbook/pci/chapter.xml
@@ -103,7 +103,7 @@ mypci_read(struct cdev *dev, struct uio *uio, int ioflag)
 
 	/* Look up our softc. */
 	sc = dev->si_drv1;
-	device_printf(sc->my_dev, "Asked to read %d bytes.\n", uio->uio_resid);
+	device_printf(sc->my_dev, "Asked to read %zd bytes.\n", uio->uio_resid);
 	return (0);
 }
 
@@ -114,7 +114,7 @@ mypci_write(struct cdev *dev, struct uio *uio, int ioflag)
 
 	/* Look up our softc. */
 	sc = dev->si_drv1;
-	device_printf(sc->my_dev, "Asked to write %d bytes.\n", uio->uio_resid);
+	device_printf(sc->my_dev, "Asked to write %zd bytes.\n", uio->uio_resid);
 	return (0);
 }