diff --git a/science/mpb/Makefile b/science/mpb/Makefile
index 3ec5fcd8a425..e737ce290106 100644
--- a/science/mpb/Makefile
+++ b/science/mpb/Makefile
@@ -1,52 +1,52 @@
 PORTNAME=	mpb
 DISTVERSION=	1.11.1
-PORTREVISION=	8
+PORTREVISION=	9
 CATEGORIES=	science
 MASTER_SITES=	https://github.com/NanoComp/mpb/releases/download/v${DISTVERSION}/
 
 MAINTAINER=	rhurlin@FreeBSD.org
 COMMENT=	MIT Photonic-Bands
 WWW=		https://mpb.readthedocs.io/en/latest/
 
 LICENSE=	GPLv2
 
 BUILD_DEPENDS=	bash:shells/bash
 # NLOPT should be enabled in science/libctl
 LIB_DEPENDS=	libctl.so:science/libctl \
 		libfftw3.so:math/fftw3 \
 		libhdf5.so:science/hdf5 \
 		libnlopt.so:math/nlopt
 
 USES=		fortran guile:2.2,alias libtool pkgconfig readline
 USE_GCC=	yes
 USE_LDCONFIG=	yes
 # Do not use --with-mpi, because it is not guaranted
 # that science/hdf5 also built with option PARALLEL
 GNU_CONFIGURE=	yes
 GNU_CONFIGURE_MANPREFIX=	${PREFIX}/share
 CONFIGURE_ARGS=	--enable-shared
 
 MAKE_JOBS_UNSAFE=	yes
 INSTALL_TARGET=	install-strip
 TEST_TARGET=	check
 
-CPPFLAGS+=	-I${LOCALBASE}/include
+CPPFLAGS+=	-I${LOCALBASE}/include -fpermissive
 LDFLAGS+=	-L${LOCALBASE}/lib
 
 OPTIONS_DEFINE=		ATLAS OPENMP
 
 ATLAS_DESC=	Use math/atlas instead of math/openblas
 OPENMP_DESC=	Use OpenMP (enable also in math/fftw3)
 
 ATLAS_LIB_DEPENDS=	libatlas.so:math/atlas
 ATLAS_USES_OFF=		blaslapack:openblas
 ATLAS_CONFIGURE_ON=	--with-lapack=-lalapack
 ATLAS_CONFIGURE_OFF=	--with-blas=openblas --with-lapack=-lopenblas
 OPENMP_CONFIGURE_ON=	--with-openmp
 
 post-install:
 	${MKDIR} ${STAGEDIR}${EXAMPLESDIR}
 	(cd ${WRKSRC}/examples && \
 	${COPYTREE_SHARE} "*.ctl *.scm" ${STAGEDIR}${EXAMPLESDIR})
 
 .include <bsd.port.mk>