Index: head/lang/mujs/Makefile
===================================================================
--- head/lang/mujs/Makefile	(revision 520422)
+++ head/lang/mujs/Makefile	(revision 520423)
@@ -1,37 +1,46 @@
 # $FreeBSD$
 
 PORTNAME=	mujs
 DISTVERSION=	1.0.6-6
 DISTVERSIONSUFFIX=	-g8c86834
+PORTREVISION=	1
 CATEGORIES=	lang devel
 
 PATCH_SITES=	https://github.com/${GH_ACCOUNT}/${PORTNAME}/commit/
 PATCHFILES=	d9a1f4c57f976eeb67d877101fcdca89ecc047ed.patch:-p1 # Enable readline on FreeBSD
 
 MAINTAINER=	yuri@FreeBSD.org
 COMMENT=	Embeddable Javascript interpreter in C
 
 LICENSE=	ISCL
 LICENSE_FILE=	${WRKSRC}/COPYING
 
 USES=		compiler:c11 gmake readline # c11 is induced by the FreeBSD headers via isnan(3), etc, otherwise the project is all c99 code
 USE_GITHUB=	yes
 GH_ACCOUNT=	ccxvii
 USE_LDCONFIG=	yes
 ALL_TARGET=	shared static
 INSTALL_TARGET=	install-shared install-static
 
 .if defined(WITH_DEBUG) # this project manages its build options itself
 MAKE_ARGS=	build=debug
 .endif
 
 PLIST_FILES=	bin/mujs \
 		include/mujs.h \
 		lib/libmujs.so \
 		lib/libmujs.a \
 		libdata/pkgconfig/mujs.pc
+
+OPTIONS_DEFINE=		32BIT
+OPTIONS_DEFAULT=	32BIT
+
+32BIT_DESC=		32-bit address space to allow for larger programs
+
+post-patch-32BIT-on:
+	@${REINPLACE_CMD} 's|typedef unsigned short js_Instruction|typedef int js_Instruction|' ${WRKSRC}/jsi.h
 
 post-install: # https://github.com/ccxvii/mujs/issues/99
 	@${STRIP_CMD} ${STAGEDIR}${PREFIX}/lib/libmujs.so
 
 .include <bsd.port.mk>