diff --git a/math/mpdecimal/Makefile b/math/mpdecimal/Makefile
index 36e9aa8dd455..2fa550d7e42f 100644
--- a/math/mpdecimal/Makefile
+++ b/math/mpdecimal/Makefile
@@ -1,28 +1,28 @@
 
 PORTNAME=	mpdecimal
 DISTVERSION=	2.5.1
 CATEGORIES=	math
 MASTER_SITES=	https://www.bytereef.org/software/mpdecimal/releases/
 
 MAINTAINER=	skrah@bytereef.org
 COMMENT=	C/C++ arbitrary precision decimal floating point libraries
 
 LICENSE=	BSD2CLAUSE
 LICENSE_FILE=	${WRKSRC}/LICENSE.txt
 
-USES=		gmake
+USES=		compiler:c++11-lang gmake
 
 GNU_CONFIGURE=	yes
 USE_LDCONFIG=	yes
 ALL_TARGET=	default
 TEST_TARGET=	check_local
 
 PORTDOCS=	libmpdec++/* libmpdec/*
 
 OPTIONS_DEFINE=	DOCS
 
 post-install:
 	${STRIP_CMD} ${STAGEDIR}${PREFIX}/lib/libmpdec.so.${DISTVERSION}
 	${STRIP_CMD} ${STAGEDIR}${PREFIX}/lib/libmpdec++.so.${DISTVERSION}
 
 .include <bsd.port.mk>