diff --git a/drivers/net/phy/phy.c b/drivers/net/phy/phy.c
index e837eb7..cda4caa 100644
--- a/drivers/net/phy/phy.c
+++ b/drivers/net/phy/phy.c
@@ -656,7 +656,8 @@
 
 	phy_probe(dev);
 
-	bus->phymap[addr] = dev;
+	if (addr >= 0 && addr < PHY_MAX_ADDR)
+		bus->phymap[addr] = dev;
 
 	return dev;
 }