diff --git a/lang/plexil/Makefile b/lang/plexil/Makefile
index bef01fc33290..64a7ed0bb19a 100644
--- a/lang/plexil/Makefile
+++ b/lang/plexil/Makefile
@@ -13,6 +13,7 @@ LICENSE=	BSD3CLAUSE
 LICENSE_FILE=	${WRKSRC}/../LICENSE
 
 USES=		gmake libtool
+USE_CXXSTD=	c++14
 USE_LDCONFIG=	yes
 
 GNU_CONFIGURE=	yes