--- a/third-party/libutp/utp.h	
+++ a/third-party/libutp/utp.h	
@@ -12,7 +12,9 @@ 
 #pragma comment(lib,"ws2_32.lib")
 #else
 #include <stdlib.h>
+#include <sys/types.h>
 #include <sys/socket.h>
+#include <netinet/in.h>
 #include <arpa/inet.h>
 #endif