Index: head/devel/libcdb/Makefile
===================================================================
--- head/devel/libcdb/Makefile	(revision 503862)
+++ head/devel/libcdb/Makefile	(revision 503863)
@@ -1,22 +1,22 @@
 # $FreeBSD$
 
 PORTNAME=	libcdb
 PORTVERSION=	g2019052401
 CATEGORIES=	devel
 
 MAINTAINER=	swills@FreeBSD.org
 COMMENT=	Constant database library
 
-USES=		gmake libtool:build
+USES=		compiler:c11 gmake libtool:build
 
 USE_GITHUB=	yes
 GH_ACCOUNT=	rmind
 GH_PROJECT=	libcdb
 GH_TAGNAME=	1d3440d
 WRKSRC_SUBDIR=	src
 USE_LDCONFIG=	yes
 MAKE_ENV=	DESTDIR=${STAGEDIR}${PREFIX} \
 		INCDIR=${LOCALBASE}/include \
 		LIBDIR=${LOCALBASE}/lib
 
 .include <bsd.port.mk>