diff --git a/mt76.h b/mt76.h
index b5f884ff..46ff96da 100644
--- a/mt76.h
+++ b/mt76.h
@@ -1752,12 +1752,12 @@ static inline int mt76_npu_send_txrx_addr(struct mt76_dev *dev, int ifindex,
 
 static inline bool mt76_npu_device_active(struct mt76_dev *dev)
 {
-	return !!rcu_access_pointer(dev->mmio.npu);
+	return mt76_is_mmio(dev) && !!rcu_access_pointer(dev->mmio.npu);
 }
 
 static inline bool mt76_ppe_device_active(struct mt76_dev *dev)
 {
-	return !!rcu_access_pointer(dev->mmio.ppe_dev);
+	return mt76_is_mmio(dev) && !!rcu_access_pointer(dev->mmio.ppe_dev);
 }
 
 static inline int mt76_npu_send_msg(struct airoha_npu *npu, int ifindex,