diff --git a/games/atc/Makefile b/games/atc/Makefile
index d00acc250993..80305a183347 100644
--- a/games/atc/Makefile
+++ b/games/atc/Makefile
@@ -2,13 +2,13 @@
 
 PROG=	atc
 CFLAGS+=-DBSD -I${.CURDIR} -I.
-SRCS=	extern.c grammar.y graphics.c input.c lex.l list.c log.c \
+SRCS=	extern.c grammar.c graphics.c input.c lex.c list.c log.c \
 	main.c tunable.c update.c
 MAN6=	atc.6
 DPADD=	${usr/lib/libl.a ${LIBM} ${LIBTERMCAP} ${LIBCURSES} ${LIBCOMPAT}
 LDADD=	-ll -lm -lcurses -ltermcap -lcompat
 GAMES=	ATC_scores Game_List Killer crossover default easy game_2
-CLEANFILES=grammer.tab.h
+CLEANFILES=grammar.c y.tab.h lex.c
 HIDEGAME=hidegame
 
 beforeinstall:
diff --git a/games/atc/lex.l b/games/atc/lex.l
index 28b00b3f5ec0..0092a2959d1d 100644
--- a/games/atc/lex.l
+++ b/games/atc/lex.l
@@ -48,7 +48,7 @@
 static char sccsid[] = "@(#)lex.l	8.1 (Berkeley) 5/31/93";
 #endif /* not lint */
 
-#include "grammar.tab.h"
+#include "y.tab.h"
 extern int	line;
 
 %}