diff --git a/devel/py-flufl.lock/Makefile b/devel/py-flufl.lock/Makefile
index 404e968f1d9f..795283d4426a 100644
--- a/devel/py-flufl.lock/Makefile
+++ b/devel/py-flufl.lock/Makefile
@@ -1,17 +1,19 @@
 PORTNAME=	flufl.lock
 PORTVERSION=	6.0
+PORTREVISION=	1
 CATEGORIES=	devel python
 MASTER_SITES=	CHEESESHOP
 PKGNAMEPREFIX=	${PYTHON_PKGNAMEPREFIX}
 
 MAINTAINER=	acm@FreeBSD.org
 COMMENT=	NFS-safe file locking with timeouts for POSIX systems
 
 LICENSE=	APACHE20
 
-RUN_DEPENDS=	${PYTHON_PKGNAMEPREFIX}atpublic>=0:devel/py-atpublic@${PY_FLAVOR}
+RUN_DEPENDS=	${PYTHON_PKGNAMEPREFIX}atpublic>=0:devel/py-atpublic@${PY_FLAVOR} \
+		${PYTHON_PKGNAMEPREFIX}psutil>=0:sysutils/py-psutil@${PY_FLAVOR}
 
 USES=		python:3.4+
 USE_PYTHON=	autoplist distutils
 
 .include <bsd.port.mk>