$OpenBSD: patch-Makefile,v 1.4 2014/05/02 13:43:24 benoit Exp $
--- Makefile.orig	Thu Apr 17 21:43:48 2014
+++ Makefile	Sun Apr 27 10:40:31 2014
@@ -223,6 +223,16 @@ endif
 endif
 endif
 
+ifndef D2U_OS
+ifeq (OpenBSD, $(shell uname -s))
+	D2U_OS = openbsd
+ifdef ENABLE_NLS
+	CFLAGS_OS     = -I/usr/local/include
+	LDFLAGS_EXTRA = -liconv -lintl -L/usr/local/lib
+endif
+endif
+endif
+
 ifeq (Darwin, $(shell uname -s))
 	D2U_OS = Darwin
 ifdef ENABLE_NLS
