diff --git a/vpn_service.h b/vpn_service.h
index a004cc7..203357f 100644
--- a/vpn_service.h
+++ b/vpn_service.h
@@ -28,6 +28,8 @@
   virtual void Connect(Error *error);
   virtual void Disconnect(Error *error);
   virtual std::string GetStorageIdentifier() const;
+  virtual bool Load(StoreInterface *storage);
+  virtual bool Save(StoreInterface *storage);
 
   VPNDriver *driver() const { return driver_.get(); }