--- screen-4.3.1/socket.c.~1~	2015-09-28 13:59:32.049275138 -0700
+++ screen-4.3.1/socket.c	2015-09-28 13:59:47.162984046 -0700
@@ -30,6 +30,9 @@
 #include <sys/types.h>
 #include <sys/stat.h>
 #include <fcntl.h>
+
+#define _XPG4_2
+
 #if !defined(NAMEDPIPE)
 # include <sys/socket.h>
 # ifdef _OpenBSD_