diff --git a/graphics/art/Makefile b/graphics/art/Makefile
index c97e55d48ecb..86dd97759d17 100644
--- a/graphics/art/Makefile
+++ b/graphics/art/Makefile
@@ -1,50 +1,51 @@
 PORTNAME=	art
 DISTVERSION=	1.15
 CATEGORIES=	graphics
 MASTER_SITES=	https://bitbucket.org/agriggio/art/downloads/
 PKGNAMESUFFIX=	-raw-image-editor
 DISTNAME=	${PORTNAME:tu}-${DISTVERSION}
 
 MAINTAINER=	yuri@FreeBSD.org
 COMMENT=	Raw image processing program
 
 LICENSE=	GPLv3
 LICENSE_FILE=	${WRKSRC}/LICENSE.txt
 
+BROKEN_armv7=	compilation fails: use of overloaded operator '[]' is ambiguous, see https://bitbucket.org/agriggio/art/issues/256/build-fails-on-32-bit-architectures-use-of
 BROKEN_i386=	ld: error: undefined symbol: __atomic_load
 
 EXTRACT_DEPENDS=	gtar:archivers/gtar # bsdtar(1) complains about hard links to itself
 BUILD_DEPENDS=	${LOCALBASE}/include/fftw3.h:math/fftw3
 LIB_DEPENDS=	libcanberra.so:audio/libcanberra \
 		libcanberra-gtk3.so:audio/libcanberra-gtk3 \
 		libexiv2.so:graphics/exiv2 \
 		libexpat.so:textproc/expat2 \
 		libfftw3f.so:math/fftw3-float \
 		libharfbuzz.so:print/harfbuzz \
 		liblensfun.so:graphics/lensfun \
 		liblcms2.so:graphics/lcms2 \
 		libpng.so:graphics/png \
 		libtiff.so:graphics/tiff
 
 USES=		cmake compiler:c++11-lang desktop-file-utils gnome jpeg pkgconfig tar:xz xorg
 USE_GNOME=	atk atkmm cairo cairomm glibmm gtkmm30 librsvg2
 USE_XORG=	x11
 
 EXTRACT_CMD=	gtar
 
 LDFLAGS+=	-lpthread # otherwise build breaks on some systems: error: undefined symbol: pthread_create
 
 .if exists(/usr/include/omp.h)
 OPTIONS_DEFINE=		OPENMP
 #OPTIONS_DEFAULT=	OPENMP
 
 OPENMP_CMAKE_BOOL=	OPTION_OMP
 OPENMP_BROKEN=		OpenMP causes asserts, see https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=261360
 .else
 CMAKE_ARGS=	-DOPTION_OMP:BOOL=OFF
 .endif
 
 post-install:
 	${RM} -r ${STAGEDIR}${PREFIX}/share/doc/ART
 
 .include <bsd.port.mk>