diff --git a/devel/py-qt4/bsd.pyqt.mk b/devel/py-qt4/bsd.pyqt.mk
index abc2b3161868..82a570c399c1 100644
--- a/devel/py-qt4/bsd.pyqt.mk
+++ b/devel/py-qt4/bsd.pyqt.mk
@@ -93,7 +93,7 @@ DISTNAME=	${PYQT4_DISTNAME}
 
 DISTINFO_FILE=	${PYQT4_DISTINFO_FILE}
 HAS_CONFIGURE=	yes
-USES=		python
+USES+=		python
 
 QT_NONSTANDARD=	yes  # Do not add unknown arguments to CONFIGURE_ARGS.
 
diff --git a/devel/py-sip/Makefile b/devel/py-sip/Makefile
index 866687e2dfef..5e84d5bc5bc0 100644
--- a/devel/py-sip/Makefile
+++ b/devel/py-sip/Makefile
@@ -12,7 +12,8 @@ DISTNAME=	${SIP_DISTNAME}
 MAINTAINER=	kde@FreeBSD.org
 COMMENT=	Python to C and C++ bindings generator
 
-USE=		python:py3kplist
+USES=		python
+USE_PYTHON=	py3kplist
 
 DATADIR=	${PREFIX}/share/py-${PORTNAME}
 DOCSDIR=	${PREFIX}/share/doc/py-${PORTNAME}