diff --git a/drivers/net/wireless/ath/ath9k/init.c b/drivers/net/wireless/ath/ath9k/init.c
index 98141b699c88..a04d8616fe09 100644
--- a/drivers/net/wireless/ath/ath9k/init.c
+++ b/drivers/net/wireless/ath/ath9k/init.c
@@ -642,7 +642,7 @@ static int ath9k_of_init(struct ath_softc *sc)
 	}
 
 	mac = of_get_mac_address(np);
-	if (mac)
+	if (!IS_ERR(mac))
 		ether_addr_copy(common->macaddr, mac);
 
 	return 0;
diff --git a/drivers/net/wireless/mediatek/mt76/eeprom.c b/drivers/net/wireless/mediatek/mt76/eeprom.c
index a1529920d877..04964937a3af 100644
--- a/drivers/net/wireless/mediatek/mt76/eeprom.c
+++ b/drivers/net/wireless/mediatek/mt76/eeprom.c
@@ -94,7 +94,7 @@ mt76_eeprom_override(struct mt76_dev *dev)
 		return;
 
 	mac = of_get_mac_address(np);
-	if (mac)
+	if (!IS_ERR(mac))
 		memcpy(dev->macaddr, mac, ETH_ALEN);
 #endif
 
diff --git a/drivers/net/wireless/ralink/rt2x00/rt2x00dev.c b/drivers/net/wireless/ralink/rt2x00/rt2x00dev.c
index bdc55d649a88..1b08b01db27b 100644
--- a/drivers/net/wireless/ralink/rt2x00/rt2x00dev.c
+++ b/drivers/net/wireless/ralink/rt2x00/rt2x00dev.c
@@ -1007,7 +1007,7 @@ void rt2x00lib_set_mac_address(struct rt2x00_dev *rt2x00dev, u8 *eeprom_mac_addr
 	const char *mac_addr;
 
 	mac_addr = of_get_mac_address(rt2x00dev->dev->of_node);
-	if (mac_addr)
+	if (!IS_ERR(mac_addr))
 		ether_addr_copy(eeprom_mac_addr, mac_addr);
 
 	if (!is_valid_ether_addr(eeprom_mac_addr)) {