$OpenBSD: patch-src_interface_c,v 1.1 2010/07/16 12:26:56 ajacoutot Exp $
--- src/interface.c.orig	Fri Jul 16 14:13:02 2010
+++ src/interface.c	Fri Jul 16 14:13:11 2010
@@ -20,6 +20,7 @@
 #  include <config.h>
 #endif
 
+#include <stdlib.h>
 #include <sys/types.h>
 #include <sys/stat.h>
 #include <string.h>
