diff -u -r ../kona-Win.3.39-69/src/0.c ./src/0.c
--- ../kona-Win.3.39-69/src/0.c	2016-04-17 18:10:22.000000000 +0000
+++ ./src/0.c	2017-07-06 22:48:04.933685208 +0000
@@ -13,6 +13,7 @@
 #if defined(__OpenBSD__) || defined(__FreeBSD__)  || defined(__NetBSD__) || defined(__ANDROID__)
 #include <sys/socket.h>
 #include <netinet/in.h>
+#include <sys/wait.h> /* For wait(2). */
 #endif
 
 #include "0.h"