diff --git a/drivers/char/moxa.c b/drivers/char/moxa.c
index b401383..96cb1f0 100644
--- a/drivers/char/moxa.c
+++ b/drivers/char/moxa.c
@@ -130,6 +130,7 @@
 typedef struct _moxa_pci_devinfo {
 	ushort busNum;
 	ushort devNum;
+	struct pci_dev *pdev;
 } moxa_pci_devinfo;
 
 typedef struct _moxa_board_conf {
@@ -324,6 +325,9 @@
 	board->busType = MOXA_BUS_TYPE_PCI;
 	board->pciInfo.busNum = p->bus->number;
 	board->pciInfo.devNum = p->devfn >> 3;
+	board->pciInfo.pdev = p;
+	/* don't lose the reference in the next pci_get_device iteration */
+	pci_dev_get(p);
 
 	return (0);
 }
@@ -493,6 +497,11 @@
 	if (tty_unregister_driver(moxaDriver))
 		printk("Couldn't unregister MOXA Intellio family serial driver\n");
 	put_tty_driver(moxaDriver);
+
+	for (i = 0; i < MAX_BOARDS; i++)
+		if (moxa_boards[i].busType == MOXA_BUS_TYPE_PCI)
+			pci_dev_put(moxa_boards[i].pciInfo.pdev);
+
 	if (verbose)
 		printk("Done\n");
 }