diff --git a/math/octave-forge-csg-toolkit/Makefile b/math/octave-forge-csg-toolkit/Makefile
index ea9bc73a08a9..ce09c981d69c 100644
--- a/math/octave-forge-csg-toolkit/Makefile
+++ b/math/octave-forge-csg-toolkit/Makefile
@@ -1,33 +1,38 @@
 PORTNAME=	octave-forge-csg-toolkit
+PORTREVISION=	1
 DISTVERSIONPREFIX=	v
 DISTVERSION=	1.2.3
 CATEGORIES=	math
 
 MAINTAINER=	stephen@FreeBSD.org
 COMMENT=	Octave-forge package ${OCTAVE_PKGNAME}
 WWW=		https://packages.octave.org/
 
 LICENSE=	GPLv3
 LICENSE_FILE=	${WRKDIR}/${OCTSRC}/COPYING
 
 USES+=		compiler:gcc-c++11-lib
 
 USE_GITHUB=	yes
 GH_ACCOUNT=	pr0m1th3as
 GH_PROJECT=	${OCTAVE_PKGNAME}
 
 # OCTSRC is the name of the directory of the package.
 # It is usually ${OCTAVE_PKGNAME} or ${DISTNAME}.
 OCTSRC=		${GH_PROJECT}-${DISTVERSION}
 
 WRKSRC=		${WRKDIR}/${OCTSRC}/src
 
 RUN_DEPENDS+=	${TARBALLS_DIR}/io.tar.gz:math/octave-forge-io
 
 .include "${.CURDIR}/../../Mk/bsd.octave.mk"
 
 post-build:
 	${RM} ${WRKSRC}/Makefile ${WRKSRC}/configure
 	cd ${WRKDIR} && ${TAR} cfz ${OCTAVE_DISTNAME}.tar.gz ${OCTSRC}
 
-.include <bsd.port.mk>
+.include <bsd.port.pre.mk>
+
+CXXFLAGS+=	-stdlib=libstdc++
+
+.include <bsd.port.post.mk>
diff --git a/math/octave-forge-csg-toolkit/files/patch-Makefile b/math/octave-forge-csg-toolkit/files/patch-Makefile
deleted file mode 100644
index 11e05c1852e5..000000000000
--- a/math/octave-forge-csg-toolkit/files/patch-Makefile
+++ /dev/null
@@ -1,11 +0,0 @@
---- Makefile.orig	2022-10-31 00:26:54 UTC
-+++ Makefile
-@@ -4,7 +4,7 @@ all:
- 	$(MKOCTFILE)       readObj.cc
- 	$(MKOCTFILE)       writeObj.cc
- 	$(MKOCTFILE)       longbone_maxDistance.cc
--	$(MKOCTFILE)       longbone_Registration.cc
-+	$(MKOCTFILE)       -stdlib=libstdc++ longbone_Registration.cc
- 	$(MKOCTFILE)       meshArea.cc
- 	$(MKOCTFILE)       meshBarycenter.cc
- 	$(MKOCTFILE)       meshSection.cc