Index: head/science/netcdf-fortran/Makefile
===================================================================
--- head/science/netcdf-fortran/Makefile	(revision 543487)
+++ head/science/netcdf-fortran/Makefile	(revision 543488)
@@ -1,32 +1,39 @@
 # Created by: Sunpoet Po-Chuan Hsieh <sunpoet@FreeBSD.org>
 # $FreeBSD$
 
 PORTNAME=	netcdf-fortran
 PORTVERSION=	4.5.2
 CATEGORIES=	science
 MASTER_SITES=	https://www.unidata.ucar.edu/downloads/netcdf/ftp/ \
 		ftp://ftp.unidata.ucar.edu/pub/netcdf/ \
 		LOCAL/sunpoet
 
 MAINTAINER=	sunpoet@FreeBSD.org
 COMMENT=	Fortran library for machine-independent, array-oriented data access
 
 LICENSE=	UCAR_UNIDATA
 LICENSE_FILE=	${WRKSRC}/COPYRIGHT
 LICENSE_NAME=	University Corporation for Atmospheric Research/Unidata
 LICENSE_PERMS=	dist-mirror dist-sell pkg-mirror pkg-sell auto-accept
 
 BUILD_DEPENDS=	netcdf>=4.6.0:science/netcdf
 LIB_DEPENDS=	libnetcdf.so:science/netcdf
 
 USES=		fortran gmake libtool localbase makeinfo pathfix
 
 CPPFLAGS+=	-fPIC -DPIC -DgFortran
 GNU_CONFIGURE=	yes
 INSTALL_TARGET=	install-strip
 MAKE_ENV=	MAKEINFOFLAGS=--no-split
 MAKE_JOBS_UNSAFE=	yes
 TEST_TARGET=	check
 USE_LDCONFIG=	yes
 
+.include <bsd.port.options.mk>
+
+# XXX: Drop after updating to 4.5.3
+.if ${FORTRAN_DEFAULT} == gfortran && ${GCC_DEFAULT} >= 10
+FCFLAGS+=	-fallow-argument-mismatch
+.endif
+
 .include <bsd.port.mk>