diff --git a/examples/QueuedMessageRouter/QueuedMessageRouter.cpp b/examples/QueuedMessageRouter/QueuedMessageRouter.cpp
index a392db95..cee5dd79 100644
--- a/examples/QueuedMessageRouter/QueuedMessageRouter.cpp
+++ b/examples/QueuedMessageRouter/QueuedMessageRouter.cpp
@@ -92,32 +92,32 @@ public:
 
       // Call the base class's receive function.
       // This will route it to the correct on_receive handler.
-      Base_t::receive(sender, msg);
+      Base_t::receive(msg);
 
       queue.pop();
     }
   }
 
   //***************************************************************************
-  void on_receive(etl::imessage_router& sender, const Message1& msg)
+  void on_receive(const Message1& msg)
   {
     std::cout << "  Received message " << int(msg.get_message_id()) << " : '" << msg.i << "'" << std::endl;
   }
 
   //***************************************************************************
-  void on_receive(etl::imessage_router& sender, const Message2& msg)
+  void on_receive(const Message2& msg)
   {
     std::cout << "  Received message " << int(msg.get_message_id()) << " : '" << msg.d << "'" << std::endl;
   }
 
   //***************************************************************************
-  void on_receive(etl::imessage_router& sender, const Message3& msg)
+  void on_receive(const Message3& msg)
   {
     std::cout << "  Received message " << int(msg.get_message_id()) << " : '" << msg.s << "'" << std::endl;
   }
 
   //***************************************************************************
-  void on_receive_unknown(etl::imessage_router& sender, const etl::imessage& msg)
+  void on_receive_unknown(const etl::imessage& msg)
   {
     std::cout << "  Received unknown message " << int(msg.get_message_id()) << std::endl;
   }