diff --git a/drivers/pci/probe.c b/drivers/pci/probe.c
index 7cc9e2f0f47c..71eac9cd724d 100644
--- a/drivers/pci/probe.c
+++ b/drivers/pci/probe.c
@@ -651,6 +651,11 @@ int __devinit pci_scan_bridge(struct pci_bus *bus, struct pci_dev *dev, int max,
 	dev_dbg(&dev->dev, "scanning [bus %02x-%02x] behind bridge, pass %d\n",
 		secondary, subordinate, pass);
 
+	if (!primary && (primary != bus->number) && secondary && subordinate) {
+		dev_warn(&dev->dev, "Primary bus is hard wired to 0\n");
+		primary = bus->number;
+	}
+
 	/* Check if setup is sensible at all */
 	if (!pass &&
 	    (primary != bus->number || secondary <= bus->number)) {