diff --git a/xxdiff/Makefile b/xxdiff/Makefile
index d968c19a61..a272b1e8ce 100644
--- a/xxdiff/Makefile
+++ b/xxdiff/Makefile
@@ -1,4 +1,4 @@
-# $NetBSD: Makefile,v 1.1.1.1 2005/10/13 08:17:36 ghen Exp $
+# $NetBSD: Makefile,v 1.2 2005/11/15 09:26:58 ghen Exp $
 
 DISTNAME=	xxdiff-3.1
 CATEGORIES=	devel
@@ -9,6 +9,8 @@ HOMEPAGE=	http://xxdiff.sourceforge.net/
 COMMENT=	Graphical file comparator and merge tool
 
 USE_TOOLS+=	gmake
+USE_TOOLS+=	bison
+USE_TOOLS+=	flex
 BUILD_DEPENDS+=	tmake>=1.7:../../devel/tmake
 
 WRKSRC=		${WRKDIR}/${PKGNAME_NOREV}/src