Index: head/graphics/libavif/Makefile
===================================================================
--- head/graphics/libavif/Makefile	(revision 531389)
+++ head/graphics/libavif/Makefile	(revision 531390)
@@ -1,37 +1,37 @@
 # $FreeBSD$
 
 PORTNAME=	libavif
 DISTVERSIONPREFIX=	v
 DISTVERSION=	0.6.3
 CATEGORIES=	graphics
 
 MAINTAINER=	jbeich@FreeBSD.org
 COMMENT=	Library for encoding and decoding .avif files
 
 LICENSE=	BSD2CLAUSE
 LICENSE_FILE=	${WRKSRC}/LICENSE
 
 LIB_DEPENDS=	libpng.so:graphics/png
 
-USES=		cmake localbase:ldflags pkgconfig
+USES=		cmake compiler:c11 localbase:ldflags pkgconfig
 USE_GITHUB=	yes
 USE_LDCONFIG=	yes
 GH_ACCOUNT=	AOMediaCodec
 CMAKE_ON=	AVIF_BUILD_APPS
 
 OPTIONS_DEFINE=	AOM DAV1D RAV1E
 OPTIONS_DEFAULT=AOM DAV1D
 
 AOM_DESC=		AV1 encoding/decoding via libaom
 AOM_LIB_DEPENDS=	libaom.so:multimedia/aom
 AOM_CMAKE_BOOL=		AVIF_CODEC_AOM
 
 DAV1D_DESC=		AV1 decoding via libdav1d
 DAV1D_LIB_DEPENDS=	libdav1d.so:multimedia/dav1d
 DAV1D_CMAKE_BOOL=	AVIF_CODEC_DAV1D
 
 RAV1E_DESC=		AV1 encoding via librav1e
 RAV1E_LIB_DEPENDS=	librav1e.so:multimedia/librav1e
 RAV1E_CMAKE_BOOL=	AVIF_CODEC_RAV1E
 
 .include <bsd.port.mk>