diff --git a/math/octave-forge-geometry/Makefile b/math/octave-forge-geometry/Makefile
index 03f9db44aa129..839239413e8da 100644
--- a/math/octave-forge-geometry/Makefile
+++ b/math/octave-forge-geometry/Makefile
@@ -16,5 +16,6 @@ RUN_DEPENDS=	${PYTHON_PKGNAMEPREFIX}lxml>=0:devel/py-lxml@${PY_FLAVOR} \
 			${OCTAVE_TARBALLS_DIR}/matgeom.tar.gz:math/octave-forge-matgeom
 
 USES=		octave python:env
+USE_CXXSTD=	c++14
 
 .include <bsd.port.mk>