diff -ru -x '*~' openvpn-2.3.1-orig/src/openvpn/init.c openvpn-2.3.1/src/openvpn/init.c
--- openvpn-2.3.1-orig/src/openvpn/init.c	2013-03-20 09:28:14.000000000 +0100
+++ openvpn-2.3.1/src/openvpn/init.c	2014-04-22 13:02:21.351026640 +0200
@@ -48,6 +48,8 @@
 
 #include "occ-inline.h"
 
+#include <systemd/sd-daemon.h>
+
 static struct context *static_context; /* GLOBAL */
 
 /*
@@ -1241,6 +1243,9 @@
 {
   static const char message[] = "Initialization Sequence Completed";
 
+  /* Tell systemd we're ready. */
+  sd_notify(0, "READY=1");
+
   /* If we delayed UID/GID downgrade or chroot, do it now */
   do_uid_gid_chroot (c, true);