Index: head/net/py-dpkt/Makefile
===================================================================
--- head/net/py-dpkt/Makefile	(revision 515130)
+++ head/net/py-dpkt/Makefile	(revision 515131)
@@ -1,26 +1,27 @@
 # $FreeBSD$
 
 PORTNAME=	dpkt
 PORTVERSION=	1.9.2
+PORTREVISION=	1
 CATEGORIES=	net python
 MASTER_SITES=	CHEESESHOP
 PKGNAMEPREFIX=	${PYTHON_PKGNAMEPREFIX}
 
 MAINTAINER=	sbz@FreeBSD.org
 COMMENT=	Python fast, simple packet creation / parsing module
 
 LICENSE=	BSD3CLAUSE
 LICENSE_FILE=	${WRKSRC}/LICENSE
 
 USES=		python
-USE_PYTHON=	distutils autoplist pythonprefix
+USE_PYTHON=	autoplist concurrent distutils pythonprefix
 
 OPTIONS_DEFINE=	DOCS
 
 PORTDOCS=	AUTHORS CHANGES PKG-INFO README.rst
 
 post-install:
 	@${MKDIR} ${STAGEDIR}${DOCSDIR}
 	${INSTALL_DATA} ${PORTDOCS:S,^,${WRKSRC}/,} ${STAGEDIR}${DOCSDIR}
 
 .include <bsd.port.mk>