diff --git a/devel/mercator/Makefile b/devel/mercator/Makefile
index 218ae0368c98..2d02d847c9a8 100644
--- a/devel/mercator/Makefile
+++ b/devel/mercator/Makefile
@@ -1,25 +1,27 @@
 PORTNAME=	mercator
 PORTVERSION=	0.3.3
 PORTREVISION=	10
 CATEGORIES=	devel
 MASTER_SITES=	SF/worldforge/Mercator%20%28terrain%20lib%29/${PORTVERSION}
 
 MAINTAINER=	oliver@FreeBSD.org
 COMMENT=	Procedural terrain library
 WWW=		https://www.worldforge.org/index.php/components/mercator/
 
 LICENSE=	GPLv2
 LICENSE_FILE=	${WRKSRC}/COPYING
 
 LIB_DEPENDS=	libwfmath-1.0.so:math/wfmath
 
 USES=		libtool pathfix pkgconfig compiler:c++11-lib
-GNU_CONFIGURE=	yes
+USE_CXXSTD=	c++14
 USE_LDCONFIG=	yes
 
+GNU_CONFIGURE=	yes
+
 CXXFLAGS+=	-include wchar.h
 
 post-patch:
 	@${REINPLACE_CMD} -e 's|std::lround|lround|g' ${WRKSRC}/Mercator/iround.h
 
 .include <bsd.port.mk>