diff --git a/daemon/face/ethernet-factory.hpp b/daemon/face/ethernet-factory.hpp
index 1dec480..d1b9ee2 100644
--- a/daemon/face/ethernet-factory.hpp
+++ b/daemon/face/ethernet-factory.hpp
@@ -38,6 +38,9 @@
 class EthernetFactory : public ProtocolFactory
 {
 public:
+  static const std::string&
+  getId();
+
   /** \brief process face_system.ether config section
    */
   void