Index: iterm/lib/src/unix/tty/ttyio.c
===================================================================
--- iterm.orig/lib/src/unix/tty/ttyio.c
+++ iterm/lib/src/unix/tty/ttyio.c
@@ -7,6 +7,8 @@
    Further information about Common Public License Version 0.5 is obtained
    from url http://oss.software.ibm.com/developer/opensource/license-cpl.html
 */
+#define _XOPEN_SOURCE 700
+
 #include "../../../config.h"
 
 #include "iterm/unix/ttyio.h"
@@ -18,9 +20,7 @@
 #include <sys/stat.h>
 #include <sys/wait.h>
 #include <fcntl.h>
-#define __USE_XOPEN
 #include <stdlib.h>
-#undef __USE_XOPEN
 #include <unistd.h>
 #include <stropts.h>