Index: head/textproc/p5-PDF-API2-XS/Makefile
===================================================================
--- head/textproc/p5-PDF-API2-XS/Makefile	(revision 547674)
+++ head/textproc/p5-PDF-API2-XS/Makefile	(revision 547675)
@@ -1,24 +1,25 @@
 # Created by: Po-Chuan Hsieh <sunpoet@FreeBSD.org>
 # $FreeBSD$
 
 PORTNAME=	PDF-API2-XS
 PORTVERSION=	1.001
 CATEGORIES=	textproc perl5
 MASTER_SITES=	CPAN
 PKGNAMEPREFIX=	p5-
 
 MAINTAINER=	sunpoet@FreeBSD.org
 COMMENT=	Optional PDF::API2 add-on using XS to speed up expensive operations
 
 LICENSE=	LGPL21+
 LICENSE_FILE=	${WRKSRC}/LICENSE
 
 TEST_DEPENDS=	p5-PDF-API2>=0:textproc/p5-PDF-API2
 
 USES=		gmake perl5
+USE_CSTD=	c99
 USE_PERL5=	configure
 
 post-install:
 	${STRIP_CMD} ${STAGEDIR}${PREFIX}/${SITE_ARCH_REL}/auto/PDF/API2/XS/ImagePNG/ImagePNG.so
 
 .include <bsd.port.mk>