Index: extcap.c
--- extcap.c.orig	2016-09-07 18:59:05.000000000 +0200
+++ extcap.c	2016-09-10 15:03:46.319416719 +0200
@@ -35,6 +35,7 @@
 #else
 /* Include for unlink */
 #include <unistd.h>
+#include <sys/wait.h>
 #endif
 
 #include <glib.h>