Index: common/message.cpp
===================================================================
--- common/message.cpp	(revision e08495082ae80810734be6bd71168a2d7ff2a384)
+++ common/message.cpp	(revision 8efe484269fe3f33dbfdac27d85a3fc215238cf8)
@@ -5,4 +5,5 @@
 #if defined WINDOWS
 	#include <winsock2.h>
+	#include <WS2tcpip.h>
 #elif defined LINUX
 	#include <sys/socket.h>