diff --git a/graphics/py-PyOpenGL-accelerate/Makefile b/graphics/py-PyOpenGL-accelerate/Makefile
index 0aa41ea15e302..395ee98853eec 100644
--- a/graphics/py-PyOpenGL-accelerate/Makefile
+++ b/graphics/py-PyOpenGL-accelerate/Makefile
@@ -17,6 +17,8 @@ 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} {} +