Index: head/devel/rubygem-tdiff/Makefile
===================================================================
--- head/devel/rubygem-tdiff/Makefile	(revision 517501)
+++ head/devel/rubygem-tdiff/Makefile	(revision 517502)
@@ -1,19 +1,20 @@
 # Created by: Sunpoet Po-Chuan Hsieh <sunpoet@FreeBSD.org>
 # $FreeBSD$
 
 PORTNAME=	tdiff
 PORTVERSION=	0.3.4
 CATEGORIES=	devel rubygems
 MASTER_SITES=	RG
 
 MAINTAINER=	sunpoet@FreeBSD.org
 COMMENT=	Calculates the differences between two tree-like structures
 
 LICENSE=	MIT
+LICENSE_FILE=	${WRKSRC}/LICENSE.txt
 
 USES=		gem
 USE_RUBY=	yes
 
 NO_ARCH=	yes
 
 .include <bsd.port.mk>