diff --git a/network_udp.h b/network_udp.h
--- a/network_udp.h
+++ b/network_udp.h
@@ -6,6 +6,6 @@ bool NetworkUDPListen(uint32 host, uint1
 void NetworkUDPReceive(void);
 void NetworkUDPSearchGame(void);
 void NetworkUDPQueryServer(const byte* host, unsigned short port);
-void NetworkUDPAdvertise();
+void NetworkUDPAdvertise(void);
 
 #endif /* NETWORK_LAN_H */