diff --git a/drivers/net/arcnet/com20020-pci.c b/drivers/net/arcnet/com20020-pci.c
index dec300cac55f9d43bd00c45623b34ff99b1527b9..f5854ab7dc32670f220c6cd875aa5253543a06ae 100644
--- a/drivers/net/arcnet/com20020-pci.c
+++ b/drivers/net/arcnet/com20020-pci.c
@@ -199,6 +199,8 @@ static int com20020pci_probe(struct pci_dev *pdev,
 		lp->timeout = timeout;
 		lp->hw.owner = THIS_MODULE;
 
+		lp->backplane = (inb(priv->misc) >> (2 + i)) & 0x1;
+
 		/* Get the dev_id from the PLX rotary coder */
 		if (!strncmp(ci->name, "EAE PLX-PCI MA1", 15))
 			dev->dev_id = 0xc;