diff --git a/astro/libnova/Makefile b/astro/libnova/Makefile
index 0a7bc455d8de..c6f7b0a8c6ac 100644
--- a/astro/libnova/Makefile
+++ b/astro/libnova/Makefile
@@ -10,6 +10,9 @@ MASTER_SITES=	SF/${PORTNAME}/${PORTNAME}/v%20${PORTVERSION}
 MAINTAINER=	ports@FreeBSD.org
 COMMENT=	Astronomical Calculation Library
 
+LICENSE=	GPLv2
+LICENSE_FILE=	${WRKSRC}/COPYING
+
 USES=		autoreconf libtool
 GNU_CONFIGURE=	yes
 USE_LDCONFIG=	yes