diff --git a/mt7615/init.c b/mt7615/init.c
index e48345b0..9c41c11e 100644
--- a/mt7615/init.c
+++ b/mt7615/init.c
@@ -389,6 +389,9 @@ int mt7615_register_ext_phy(struct mt7615_dev *dev)
 	struct mt76_phy *mphy;
 	int ret;
 
+	if (!is_mt7615(&dev->mt76))
+		return -EOPNOTSUPP;
+
 	if (test_bit(MT76_STATE_RUNNING, &dev->mphy.state))
 		return -EINVAL;