diff --git a/math/py-pygslodeiv2/Makefile b/math/py-pygslodeiv2/Makefile
index 02c44ea41255..4a431d6e4ded 100644
--- a/math/py-pygslodeiv2/Makefile
+++ b/math/py-pygslodeiv2/Makefile
@@ -1,6 +1,6 @@
 PORTNAME=	pygslodeiv2
 DISTVERSION=	0.9.4
-PORTREVISION=	3
+PORTREVISION=	4
 CATEGORIES=	math python
 MASTER_SITES=	PYPI
 PKGNAMEPREFIX=	${PYTHON_PKGNAMEPREFIX}
@@ -17,7 +17,7 @@ LIB_DEPENDS=	libgsl.so:math/gsl
 RUN_DEPENDS=	${PYNUMPY}
 
 USES=		compiler:c++11-lang localbase python
-USE_PYTHON=	distutils autoplist pytest
+USE_PYTHON=	distutils autoplist cython pytest
 
 pre-test:
 	@cd ${WRKSRC} && ${PYTHON_CMD} ${PYSETUP} build_ext --inplace