Index: ports/x11-toolkits/py-wxPython40/Makefile
===================================================================
--- ports/x11-toolkits/py-wxPython40/Makefile	(revision 547569)
+++ ports/x11-toolkits/py-wxPython40/Makefile	(working copy)
@@ -20,6 +20,8 @@
 
 BUILD_DEPENDS=	${PYTHON_PKGNAMEPREFIX}pathlib2>0:devel/py-pathlib2@${PY_FLAVOR}
 
+RUN_DEPENDS= ${PYTHON_PKGNAMEPREFIX}six>0:devel/py-six@${PY_FLAVOR}
+
 USES=		compiler:c++11-lib gl localbase pkgconfig python
 USE_GL=		glu
 USE_WX=		3.0