Index: head/devel/pructl/Makefile
===================================================================
--- head/devel/pructl/Makefile	(revision 488447)
+++ head/devel/pructl/Makefile	(revision 488448)
@@ -1,20 +1,21 @@
 # $FreeBSD$
 
 PORTNAME=	pructl
 PORTVERSION=	0.2
 PORTREVISION=	1
 CATEGORIES=	devel
 MASTER_SITES=	https://bitbucket.org/rpaulo/pructl/get/
 
 MAINTAINER=	ports@FreeBSD.org
 COMMENT=	Utilities to interface with PRUs
 
 LICENSE=	BSD2CLAUSE
 
 LIB_DEPENDS=	libpru.so:devel/libpru
 
 USES=		cmake libedit
+USE_CSTD=	c99
 
 WRKSRC=		${WRKDIR}/rpaulo-pructl-ef9fa544e6a3
 
 .include <bsd.port.mk>