diff --git a/drivers/char/moxa.c b/drivers/char/moxa.c
index 2d025a9fd14ddeb5d6d52d5bce0411c10354a9bd..8b316953173dd5c168b2c00985c513207ea5c3ba 100644
--- a/drivers/char/moxa.c
+++ b/drivers/char/moxa.c
@@ -498,9 +498,12 @@ static void __exit moxa_exit(void)
 		printk("Couldn't unregister MOXA Intellio family serial driver\n");
 	put_tty_driver(moxaDriver);
 
-	for (i = 0; i < MAX_BOARDS; i++)
+	for (i = 0; i < MAX_BOARDS; i++) {
+		if (moxaBaseAddr[i])
+			iounmap(moxaBaseAddr[i]);
 		if (moxa_boards[i].busType == MOXA_BUS_TYPE_PCI)
 			pci_dev_put(moxa_boards[i].pciInfo.pdev);
+	}
 
 	if (verbose)
 		printk("Done\n");