diff --git a/drivers/net/wan/lmc/lmc_main.c b/drivers/net/wan/lmc/lmc_main.c
index 36600b0a0ab06f174ff534145c8ec5a07eaa92cf..1ee4c8a9063205f0de8bc9900a46d89f781f620c 100644
--- a/drivers/net/wan/lmc/lmc_main.c
+++ b/drivers/net/wan/lmc/lmc_main.c
@@ -901,6 +901,8 @@ static int lmc_init_one(struct pci_dev *pdev, const struct pci_device_id *ent)
         break;
     default:
 	printk(KERN_WARNING "%s: LMC UNKNOWN CARD!\n", dev->name);
+	unregister_hdlc_device(dev);
+	return -EIO;
         break;
     }