Index: sample/pingpong/PingPong.cpp
===================================================================
--- sample/pingpong/PingPong.cpp	(revision 6959)
+++ sample/pingpong/PingPong.cpp	(revision 7468)
@@ -210,5 +210,5 @@
 }
 
-bool PingPong::onLinkRequest(const NodeID& remote, const DataMessage& msg) {
+bool PingPong::onLinkRequest(const NodeID& remote) {
 	logging_info( "node " << remote.toString() << " wants to build up a link with us ... allowing" );
 	return true;
Index: sample/pingpong/PingPong.h
===================================================================
--- sample/pingpong/PingPong.h	(revision 6959)
+++ sample/pingpong/PingPong.h	(revision 7468)
@@ -38,6 +38,5 @@
 protected:
 	// communication listener interface
-	virtual bool onLinkRequest(const NodeID& remote, const DataMessage& msg =
-			DataMessage::UNSPECIFIED);
+	virtual bool onLinkRequest(const NodeID& remote);
 	virtual void onMessage(const DataMessage& msg, const NodeID& remote,
 		const LinkID& lnk = LinkID::UNSPECIFIED);