diff --git a/science/dftd4/Makefile b/science/dftd4/Makefile
index dd8a457c17cad..b2679f1da76bd 100644
--- a/science/dftd4/Makefile
+++ b/science/dftd4/Makefile
@@ -11,8 +11,6 @@ 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 \
@@ -25,6 +23,12 @@ 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
 
diff --git a/science/dynare/Makefile b/science/dynare/Makefile
index 424811f230a41..2b73cb09e1423 100644
--- a/science/dynare/Makefile
+++ b/science/dynare/Makefile
@@ -12,7 +12,6 @@ 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 \
@@ -49,6 +48,12 @@ OCTAVE_LIB_DEPENDS=		libfftw3.so:math/fftw3 \
 				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