Index: head/cad/ngspice_rework/Makefile
===================================================================
--- head/cad/ngspice_rework/Makefile	(revision 516229)
+++ head/cad/ngspice_rework/Makefile	(revision 516230)
@@ -1,47 +1,47 @@
 # Created by: AMAKAWA Shuhei <amakawa@jp.FreeBSD.org>
 # $FreeBSD$
 
 PORTNAME=	ngspice_rework
-PORTVERSION=	30
-PORTREVISION=	1
+PORTVERSION=	31
 CATEGORIES=	cad
 MASTER_SITES=	SF/ngspice/ng-spice-rework/${PORTVERSION}
 DISTNAME=	ngspice-${PORTVERSION}
 
 MAINTAINER=	kevinz5000@gmail.com
 COMMENT=	Mixed-signal circuit simulator derived from Spice and Cider
 
 LICENSE=	BSD3CLAUSE BSD4CLAUSE LGPL21+
 LICENSE_COMB=	multi
 LICENSE_FILE=	${WRKSRC}/COPYING
 
 LIB_DEPENDS=	libfftw3.so:math/fftw3
 
 FLAVORS=	x11 shlib
 shlib_PKGNAMESUFFIX=	-shlib
 shlib_CONFLICTS_INSTALL=	ngspice_rework-2*
 x11_CONFLICTS_INSTALL=		ngspice_rework-shlib-2*
 
 USES=		gmake libtool ncurses readline
 
 USE_LDCONFIG=	yes
 GNU_CONFIGURE=	yes
 
 CONFIGURE_ARGS=	--enable-cider --enable-shared --enable-xspice --with-readline=yes
 
 OPTIONS_DEFINE=	DEBUG
 
 .if ${FLAVOR:U} ==	shlib
 CONFIGURE_ARGS+=	--with-ngshared
 PLIST_SUB+=		SHLIB="" X11="@comment "
 .else
+USES+=			xorg
 USE_XORG=		ice sm x11 xaw xext xmu xt
 CONFIGURE_ARGS+=	--with-x
 PLIST_SUB+=		SHLIB="@comment " X11=""
 .endif
 
 DEBUG_CONFIGURE_ENABLE=	debug
 
 INSTALL_TARGET=	install-strip
 
 .include <bsd.port.mk>
Index: head/cad/ngspice_rework/distinfo
===================================================================
--- head/cad/ngspice_rework/distinfo	(revision 516229)
+++ head/cad/ngspice_rework/distinfo	(revision 516230)
@@ -1,3 +1,3 @@
-TIMESTAMP = 1546576070
-SHA256 (ngspice-30.tar.gz) = 08fe0e2f3768059411328a33e736df441d7e6e7304f8dad0ed5f28e15d936097
-SIZE (ngspice-30.tar.gz) = 7147044
+TIMESTAMP = 1572299061
+SHA256 (ngspice-31.tar.gz) = 845f3b0c962e47ded051dfbc134c3c1e4ac925c9f0ce1cb3df64eb9b9da5c282
+SIZE (ngspice-31.tar.gz) = 7250057