diff --git a/math/jacal/Makefile b/math/jacal/Makefile
index 5c2285bc873e..7176c974e6c9 100644
--- a/math/jacal/Makefile
+++ b/math/jacal/Makefile
@@ -1,31 +1,39 @@
 PORTNAME=	jacal
 PORTVERSION=	1c8
 CATEGORIES=	math
 MASTER_SITES=	http://groups.csail.mit.edu/mac/ftpdir/scm/
 
 MAINTAINER=	bofh@FreeBSD.org
 COMMENT=	Symbolic mathematics program written in Scheme
 WWW=		https://people.csail.mit.edu/jaffer/JACAL
 
 LICENSE=	GPLv3
 
 RUN_DEPENDS=	scm:lang/scm \
 		${LOCALBASE}/share/slib/require.scm:lang/slib
 
-USES=		gmake makeinfo zip
+USES=		gmake zip
 
 HAS_CONFIGURE=	yes
 WRKSRC=		${WRKDIR}/${PORTNAME}
 
 NO_BUILD=	yes
 
-INFO=		jacal
+OPTIONS_DEFINE=	INFO
+OPTIONS_DEFAULT=	INFO
+
+INFO_USES=		makeinfo
+INFO_INFO=		jacal
 
 post-patch:
 	${FIND} ${WRKSRC} -type f -exec ${REINPLACE_CMD} -i '' -e 's|%%PREFIX%%|${PREFIX}|' {} \;
 	${CHMOD} +x ${WRKSRC}/configure
 
+post-patch-INFO-off:
+	${REINPLACE_CMD} -e '/^install:/s|install-infoz||g' \
+		${WRKSRC}/Makefile
+
 post-install:
 	${SED} -i '' -e 's|${STAGEDIR}${PREFIX}|${PREFIX}|g' ${STAGEDIR}${PREFIX}/bin/jacal
 
 .include <bsd.port.mk>