Index: head/sysutils/dtc/Makefile
===================================================================
--- head/sysutils/dtc/Makefile	(revision 548781)
+++ head/sysutils/dtc/Makefile	(revision 548782)
@@ -1,33 +1,33 @@
 # $FreeBSD$
 
 PORTNAME=	dtc
 PORTVERSION=	1.6.0
 DISTVERSIONPREFIX=	v
 CATEGORIES=	sysutils
 
 PATCH_SITES=	https://github.com/dgibson/dtc/commit/
 PATCHFILES+=	ca19c3db2b.patch:-p1 # https://github.com/dgibson/dtc/pull/41
 
 MAINTAINER=	uboot@FreeBSD.org
 COMMENT=	Device Tree Compiler
 
 LICENSE=	GPLv2
 
 LIB_DEPENDS=	libyaml.so:textproc/libyaml
 
-USES=		bison gmake pkgconfig shebangfix
+USES=		bison compiler:c11 gmake pkgconfig shebangfix
 USE_LDCONFIG=	yes
 SHEBANG_FILES=	dtdiff
 
 TEST_TARGET=	check
 TEST_ENV=	STATSZ="stat -f %Uz"
 
 USE_GITHUB=	yes
 GH_ACCOUNT=	dgibson
 GH_PROJECT=	dtc
 
 MAKE_ARGS+=	PREFIX=${PREFIX} NO_PYTHON=yes \
 		INSTALL_PROGRAM="${INSTALL_PROGRAM}" \
 		INSTALL_LIB="${INSTALL_LIB}"
 
 .include <bsd.port.mk>