diff --git a/graphics/opencsg/Makefile b/graphics/opencsg/Makefile
index 11a1bf7a8c56..41a1755e8f0a 100644
--- a/graphics/opencsg/Makefile
+++ b/graphics/opencsg/Makefile
@@ -1,21 +1,21 @@
 PORTNAME=	opencsg
 PORTVERSION=	1.6.0
 #PORTREVISION=	1
 CATEGORIES=	graphics
 MASTER_SITES=	http://www.opencsg.org/
 DISTNAME=	OpenCSG-${PORTVERSION}
 
 MAINTAINER=	mr@FreeBSD.org
 COMMENT=	Constructive Solid Geometry rendering library
 WWW=		https://www.opencsg.org/
 
-LICENSE=	GPLv2
-LICENSE_FILE=	${WRKSRC}/../copying.txt
+LICENSE=	GPLv2+
+LICENSE_FILE=	${WRKSRC}/copying.txt
 
 USES=		compiler:c++11-lang gl qmake qt:5
-USE_GL=		gl glesv2 glew
-USE_QT=		opengl qmake:build
-WRKSRC=		${WRKDIR}/${DISTNAME}/src
+USE_GL=		gl glu glut
+USE_LDCONFIG=	yes
+USE_QT=		opengl
 PLIST_SUB=	PORTVERSION=${PORTVERSION}
 
 .include <bsd.port.mk>