diff --git a/arch/powerpc/sysdev/tsi108_dev.c b/arch/powerpc/sysdev/tsi108_dev.c
index 1f1af12f23e2..c92dcac85231 100644
--- a/arch/powerpc/sysdev/tsi108_dev.c
+++ b/arch/powerpc/sysdev/tsi108_dev.c
@@ -105,7 +105,7 @@ static int __init tsi108_eth_of_init(void)
 		}
 
 		mac_addr = of_get_mac_address(np);
-		if (mac_addr)
+		if (!IS_ERR(mac_addr))
 			memcpy(tsi_eth_data.mac_addr, mac_addr, 6);
 
 		ph = of_get_property(np, "mdio-handle", NULL);