$OpenBSD$
--- build/client.mk.orig	Mon Jun 15 13:13:04 2009
+++ build/client.mk	Mon Jun 15 13:13:19 2009
@@ -103,7 +103,7 @@ CLIENT_SRCS = \
 	shared/infostring.c \
 	shared/shared.c
 
-ifneq ($(findstring $(TARGET_OS), netbsd freebsd linux-gnu),)
+ifneq ($(findstring $(TARGET_OS), openbsd netbsd freebsd linux-gnu),)
 	CLIENT_SRCS+= \
 		ports/linux/linux_main.c \
 		ports/unix/unix_console.c \