diff --git a/daemon/face/face-system.hpp b/daemon/face/face-system.hpp
index 18da37e..833da1b 100644
--- a/daemon/face/face-system.hpp
+++ b/daemon/face/face-system.hpp
@@ -39,6 +39,7 @@
 
 namespace face {
 
+class NetdevBound;
 class ProtocolFactory;
 struct ProtocolFactoryCtorParams;
 
@@ -69,6 +70,9 @@
   ProtocolFactory*
   getFactoryByScheme(const std::string& scheme);
 
+  bool
+  hasFactoryForScheme(const std::string& scheme) const;
+
   FaceTable&
   getFaceTable()
   {
@@ -109,6 +113,7 @@
   /** \brief config section name => protocol factory
    */
   std::map<std::string, unique_ptr<ProtocolFactory>> m_factories;
+  unique_ptr<NetdevBound> m_netdevBound;
 
 private:
   /** \brief scheme => protocol factory
@@ -118,7 +123,6 @@
   std::map<std::string, ProtocolFactory*> m_factoryByScheme;
 
   FaceTable& m_faceTable;
-
   shared_ptr<ndn::net::NetworkMonitor> m_netmon;
 };