diff --git a/daemon/face/protocol-factory.hpp b/daemon/face/protocol-factory.hpp
index 48f755a..72018f0 100644
--- a/daemon/face/protocol-factory.hpp
+++ b/daemon/face/protocol-factory.hpp
@@ -104,11 +104,7 @@
    */
   virtual void
   processConfig(OptionalConfigSection configSection,
-                FaceSystem::ConfigContext& context)
-  {
-    ///\todo implement in every subclass and make this pure-virtual
-    BOOST_THROW_EXCEPTION(Error("processConfig is not implemented"));
-  }
+                FaceSystem::ConfigContext& context) = 0;
 
   /** \return FaceUri schemes accepted by this ProtocolFactory
    */