diff --git a/science/xcfun/Makefile b/science/xcfun/Makefile
index f09d643933d2..2b57fa857a8e 100644
--- a/science/xcfun/Makefile
+++ b/science/xcfun/Makefile
@@ -1,19 +1,19 @@
 PORTNAME=	xcfun
 DISTVERSIONPREFIX=	v
 DISTVERSION=	2.1.1-1
 DISTVERSIONSUFFIX=	-gf87ca0e
 CATEGORIES=	science
 
 MAINTAINER=	yuri@FreeBSD.org
 COMMENT=	Exchange-correlation functionals with arbitrary-order derivatives
 
 LICENSE=	MPL20
 LICENSE_FILE=	${WRKSRC}/LICENSE.md
 
-USES=		cmake
+USES=		cmake compiler:c++11-lang
 USE_LDCONFIG=	yes
 
 USE_GITHUB=	yes
 GH_ACCOUNT=	dftlibs
 
 .include <bsd.port.mk>