Index: head/databases/timescaledb/Makefile
===================================================================
--- head/databases/timescaledb/Makefile	(revision 445048)
+++ head/databases/timescaledb/Makefile	(revision 445049)
@@ -1,28 +1,28 @@
 # Created by: Kevin Bowling <kbowling@freebsd.org>
 # $FreeBSD$
 
 PORTNAME=	timescaledb
 PORTVERSION=	0.1.0
 CATEGORIES=	databases
 
 MAINTAINER=	kbowling@FreeBSD.org
 COMMENT=	Time-series database built on PostgreSQL
 
 LICENSE=	APACHE20
 
 USE_GITHUB=	YES
 GH_ACCOUNT=	timescale
 
 MAKE_ARGS=	PG_CONFIG=${LOCALBASE}/bin/pg_config USE_PGXS=1 \
 		install_bin=/usr/bin/install
 USE_LDCONFIG=	yes
-USES=		gmake pgsql:9.6
+USES=		compiler:c11 gmake pgsql:9.6
 
 PLIST_FILES=	lib/postgresql/timescaledb.so \
 		share/postgresql/extension/timescaledb--0.1.0.sql \
 		share/postgresql/extension/timescaledb.control
 
 post-install:
 	${STRIP_CMD} ${STAGEDIR}${PREFIX}/lib/postgresql/timescaledb.so
 
 .include <bsd.port.mk>