diff --git a/science/dftd4/Makefile b/science/dftd4/Makefile
index dd8a457c17ca..b2679f1da76b 100644
--- a/science/dftd4/Makefile
+++ b/science/dftd4/Makefile
@@ -1,31 +1,35 @@
 PORTNAME=	dftd4
 DISTVERSIONPREFIX=	v
 DISTVERSION=	3.4.0
 CATEGORIES=	science # chemistry
 
 MAINTAINER=	yuri@FreeBSD.org
 COMMENT=	Atomic-charge dependent london dispersion correction computation
 WWW=		https://www.chemie.uni-bonn.de/pctc/mulliken-center/software/dftd4
 
 LICENSE=	GPLv3
 LICENSE_FILE=	${WRKSRC}/COPYING
 
 BROKEN_aarch64=	Cannot open module file 'ieee_arithmetic.mod' for reading at (1): No such file or directory
-BROKEN_powerpc64=	Cannot open module file 'ieee_arithmetic.mod' for reading at (1): No such file or directory
-BROKEN_powerpc64le=	Cannot open module file 'ieee_arithmetic.mod' for reading at (1): No such file or directory
 
 BUILD_DEPENDS=	mstore>0:science/mstore
 LIB_DEPENDS=	libmctc-lib.so:science/mctc-lib \
 		libmulticharge.so:science/multicharge \
 		libopenblas.so:math/openblas
 
 USES=		cmake:testing fortran
 USE_GITHUB=	yes
 USE_LDCONFIG=	yes
 
 CMAKE_ON=	BUILD_SHARED_LIBS
 
+.include <bsd.port.options.mk>
+.if (${ARCH} == powerpc64le || ${ARCH} == powerpc64 || ${ARCH} == powerpc) && ${OSVERSION} < 1301510 # support added in e09d209d1a74a3caca95dea303db9bc605fce1a7
+BROKEN_powerpc64=	Cannot open module file 'ieee_arithmetic.mod' for reading at (1): No such file or directory
+BROKEN_powerpc64le=	Cannot open module file 'ieee_arithmetic.mod' for reading at (1): No such file or directory
+.endif
+
 post-patch: # see https://github.com/toml-f/toml-f/issues/51
 	@${REINPLACE_CMD} -e 's|$${CMAKE_Fortran_COMPILER_ID}-$${CMAKE_Fortran_COMPILER_VERSION}||' ${WRKSRC}/config/CMakeLists.txt
 
 .include <bsd.port.mk>
diff --git a/science/dynare/Makefile b/science/dynare/Makefile
index 424811f230a4..2b73cb09e142 100644
--- a/science/dynare/Makefile
+++ b/science/dynare/Makefile
@@ -1,56 +1,61 @@
 PORTNAME=	dynare
 DISTVERSION=	5.2
 PORTREVISION=	2
 CATEGORIES=	science # economics
 MASTER_SITES=	https://www.dynare.org/release/source/
 
 MAINTAINER=	yuri@FreeBSD.org
 COMMENT=	Software platform for handling a wide class of economic models
 WWW=		https://www.dynare.org/
 
 LICENSE=	GPLv3
 LICENSE_FILE=	${WRKSRC}/COPYING
 
 BROKEN_aarch64=	cannot open module file 'ieee_arithmetic.mod' for reading at (1): No such file or directory
-BROKEN_powerpc64=	cannot open module file 'ieee_arithmetic.mod' for reading at (1): No such file or directory
 
 BUILD_DEPENDS=	${LOCALBASE}/include/boost/tokenizer.hpp:devel/boost-libs
 LIB_DEPENDS=	libhdf5.so:science/hdf5 \
 		libmatio.so:math/matio \
 		libopenblas.so:math/openblas \
 		libsz.so:science/libaec
 RUN_DEPENDS=	epstool:graphics/epstool \
 		gnuplot:math/gnuplot \
 		pstoedit:graphics/pstoedit \
 		xfig:graphics/xfig # README says that these executables are required for the test suite
 
 USES=		bison compiler:c++17-lang fortran gmake localbase tar:xz tex
 USE_TEX=	pdftex
 
 GNU_CONFIGURE=	yes
 CONFIGURE_ARGS=	--disable-matlab \
 		--disable-doc
 
 FCFLAGS+=	-fPIC # required because configure tests with -shared
 
 SUB_FILES=	pkg-message
 
 OPTIONS_DEFINE=			OCTAVE
 OPTIONS_DEFAULT=		OCTAVE
 OPTIONS_SUB=			yes
 
 OCTAVE_DESC=			Integrate with Octave (main way to use Dynare)
 OCTAVE_CONFIGURE_ENABLE=	octave
 OCTAVE_CONFIGURE_ON=		--disable-mex-kalman-steady-state # Kalman Steady State MEX file for Octave - requires the non-free library slicot-5.0
 OCTAVE_BUILD_DEPENDS=		octave:math/octave
 OCTAVE_LIB_DEPENDS=		libfftw3.so:math/fftw3 \
 				libfftw3f.so:math/fftw3-float \
 				libgsl.so:math/gsl \
 				libumfpack.so:math/suitesparse-umfpack
 OCTAVE_RUN_DEPENDS=		octave:math/octave
 
+.include <bsd.port.options.mk>
+.if (${ARCH} == powerpc64le || ${ARCH} == powerpc64 || ${ARCH} == powerpc) && ${OSVERSION} < 1301510 # support added in e09d209d1a74a3caca95dea303db9bc605fce1a7
+BROKEN_powerpc64=	Cannot open module file 'ieee_arithmetic.mod' for reading at (1): No such file or directory
+BROKEN_powerpc64le=	Cannot open module file 'ieee_arithmetic.mod' for reading at (1): No such file or directory
+.endif
+
 post-install:
 	# remove empty directories, see https://git.dynare.org/Dynare/dynare/-/issues/1835
 	@${FIND} ${STAGEDIR}${PREFIX} -type d -empty -delete
 
 .include <bsd.port.mk>