diff --git a/drivers/w1/masters/matrox_w1.c b/drivers/w1/masters/matrox_w1.c
index 2788b8ca9bb1e882b127e23ec9550e2d6f76fe7f..6f9d880ab2e9e0d9f3a0bff4c4d90ab668ff39e8 100644
--- a/drivers/w1/masters/matrox_w1.c
+++ b/drivers/w1/masters/matrox_w1.c
@@ -215,6 +215,8 @@ static int __devinit matrox_w1_probe(struct pci_dev *pdev, const struct pci_devi
 	return 0;
 
 err_out_free_device:
+	if (dev->virt_addr)
+		iounmap(dev->virt_addr);
 	kfree(dev);
 
 	return err;