diff --git a/math/ann/Makefile b/math/ann/Makefile
index 30b453d0ecc5..dd49b5850272 100644
--- a/math/ann/Makefile
+++ b/math/ann/Makefile
@@ -1,24 +1,25 @@
 PORTNAME=	ann
 PORTVERSION=	1.1.2
 PORTREVISION=	1
 CATEGORIES=	math science
 MASTER_SITES=	http://www.cs.umd.edu/~mount/ANN/Files/1.1.2/
 DISTNAME=	ann_1.1.2
 
 MAINTAINER=	tzhuan@csie.org
 COMMENT=	Library for Approximate Nearest Neighbor Searching
 WWW=		https://www.cs.umd.edu/~mount/ANN/
 
-USE_LDCONFIG=	yes
 USES=		gmake
+USE_CXXSTD=	c++14
+USE_LDCONFIG=	yes
 
 post-install:
 	${INSTALL_LIB} ${WRKSRC}/lib/libann.so.0 ${STAGEDIR}${PREFIX}/lib
 	${INSTALL_DATA} ${WRKSRC}/lib/libann.a ${STAGEDIR}${PREFIX}/lib
 	${LN} -fs libann.so.0 ${STAGEDIR}${PREFIX}/lib/libann.so
 	${MKDIR} ${STAGEDIR}${PREFIX}/include/ANN
 	${INSTALL_DATA} ${WRKSRC}/include/ANN/* ${STAGEDIR}${PREFIX}/include/ANN
 	${MKDIR} ${STAGEDIR}${DOCSDIR}
 	${INSTALL_DATA} ${WRKSRC}/doc/ANNmanual.pdf ${STAGEDIR}${DOCSDIR}
 
 .include <bsd.port.mk>