Index: atc/Makefile
@@ -2,7 +2,7 @@
 # $FreeBSD: ports/games/freebsd-games/files/patch-atc_Makefile,v 1.1 2007/03/23 23:02:33 nox Exp $
 
 PROG=	atc
-CFLAGS+=-DBSD -I${.CURDIR} -I.
+CFLAGS+=-DPOSIX -I${.CURDIR} -I.
 SRCS=	extern.c grammar.y graphics.c input.c lex.l list.c log.c \
 	main.c tunable.c update.c y.tab.h
 MAN=	atc.6
