diff --git a/src/net/servergamestate.h b/src/net/servergamestate.h
index 57d2d238..e87a2450 100644
--- a/src/net/servergamestate.h
+++ b/src/net/servergamestate.h
@@ -182,16 +182,16 @@ public:
 	static ServerGameStateFinal &Instance();
 
 	virtual ~ServerGameStateFinal() {}
-	virtual void Enter(boost::shared_ptr<ServerGame> server) {}
-	virtual void Exit(boost::shared_ptr<ServerGame> server) {}
+	virtual void Enter(boost::shared_ptr<ServerGame> /*server*/) {}
+	virtual void Exit(boost::shared_ptr<ServerGame> /*server*/) {}
 
-	virtual void NotifyGameAdminChanged(boost::shared_ptr<ServerGame> server) {}
+	virtual void NotifyGameAdminChanged(boost::shared_ptr<ServerGame> /*server*/) {}
 
 	// Handling of a new session.
-	virtual void HandleNewSession(boost::shared_ptr<ServerGame> server, SessionWrapper session) {}
+	virtual void HandleNewSession(boost::shared_ptr<ServerGame> /*server*/, SessionWrapper /*session*/) {}
 
 	// Main processing function of the current state.
-	virtual int ProcessPacket(boost::shared_ptr<ServerGame> server, SessionWrapper session, boost::shared_ptr<NetPacket> packet) {}
+	virtual int ProcessPacket(boost::shared_ptr<ServerGame> /*server*/, SessionWrapper /*session*/, boost::shared_ptr<NetPacket> /*packet*/) {return 0;}
 
 protected:
 	ServerGameStateFinal() {}