diff --git a/graphics/py-PyOpenGL-accelerate/Makefile b/graphics/py-PyOpenGL-accelerate/Makefile
index 0aa41ea15e30..395ee98853ee 100644
--- a/graphics/py-PyOpenGL-accelerate/Makefile
+++ b/graphics/py-PyOpenGL-accelerate/Makefile
@@ -1,23 +1,25 @@
 PORTNAME=	PyOpenGL-accelerate
 PORTVERSION=	3.1.6
 CATEGORIES=	graphics python
 MASTER_SITES=	PYPI
 PKGNAMEPREFIX=	${PYTHON_PKGNAMEPREFIX}
 
 MAINTAINER=	python@FreeBSD.org
 COMMENT=	OpenGL acceleration code for PyOpenGL
 WWW=		http://pyopengl.sourceforge.net/
 
 LICENSE=	BSD3CLAUSE
 LICENSE_FILE=	${WRKSRC}/license.txt
 
 BUILD_DEPENDS=	${PYTHON_PKGNAMEPREFIX}numpy>=0,1:math/py-numpy@${PY_FLAVOR}
 RUN_DEPENDS=	${PYTHON_PKGNAMEPREFIX}numpy>=0,1:math/py-numpy@${PY_FLAVOR}
 
 USES=		python:3.6+
 USE_PYTHON=	autoplist cython distutils
 
+CFLAGS=		-Wno-int-conversion
+
 post-install:
 	${FIND} ${STAGEDIR}${PYTHON_SITELIBDIR} -name '*.so' -exec ${STRIP_CMD} {} +
 
 .include <bsd.port.mk>