diff --git a/cad/py-ocp/Makefile b/cad/py-ocp/Makefile
index 5b1b821e21bc..f0a6dbbb6137 100644
--- a/cad/py-ocp/Makefile
+++ b/cad/py-ocp/Makefile
@@ -1,45 +1,42 @@
 PORTNAME=	ocp
 DISTVERSION=	7.4-RC2
-PORTREVISION=	1
+PORTREVISION=	2
 CATEGORIES=	cad
 # Direct access to github is needed because the release added an extra archive which
 # we need to build from, rather than the initial release.
 MASTER_SITES=	https://github.com/CadQuery/OCP/releases/download/${DISTVERSION}/
 PKGNAMEPREFIX=	${PYTHON_PKGNAMEPREFIX}
 DISTNAME=	OCP_src_Linux
 
 MAINTAINER=	ports@nicandneal.net
 COMMENT=	Python wrapper for OCCT generated using pywrap
 
+BROKEN=		Mismatch between OpenCascase (7.5) and py-ocp (7.4)
+
 LICENSE=	APACHE20
 
 PATCH_DEPENDS=	${LOCALBASE}/include/OpenCASCADE/OpenGl_HaltonSampler.hxx:cad/opencascade
 LIB_DEPENDS=	libTKernel.so:cad/opencascade
 BUILD_DEPENDS=	${LOCALBASE}/share/cmake/pybind11/pybind11Config.cmake:devel/pybind11 \
 		${PYTHON_SITELIBDIR}/pybind11:devel/py-pybind11@${PY_FLAVOR}
 
 USES=		cmake compiler:c++11-lang gl python:3.6+ zip
 USE_GL=		gl glu glut
 
 WRKSRC=		${WRKDIR}/OCP_src_Ubuntu-16.04
 
 OCCT=		${LOCALBASE}/include/OpenCASCADE
 OCCT_LOCAL=	${WRKSRC}/OCCT
 
 CMAKE_ARGS=	-DOPENCASCADE_INCLUDE_DIR=${OCCT} \
 		-DPYTHON_EXECUTABLE=${PYTHON_CMD}
 
 USE_PYTHON=	flavors
 
 PLIST_FILES=	${PYTHON_SITELIBDIR}/OCP.so
 
-pre-patch:
-# Copy and patch a header file with a troublesome C++ standard mismatch.
-	${MKDIR} ${OCCT_LOCAL}
-	${CP} ${OCCT}/OpenGl_HaltonSampler.hxx ${OCCT_LOCAL}
-
 do-install:
 	@${MKDIR} ${STAGEDIR}${PYTHON_SITELIBDIR}/
 	${INSTALL_LIB} ${BUILD_WRKSRC}/OCP.so ${STAGEDIR}${PYTHON_SITELIBDIR}
 
 .include <bsd.port.mk>
diff --git a/cad/py-ocp/files/patch-OCCT_OpenGl__HaltonSampler.hxx b/cad/py-ocp/files/patch-OCCT_OpenGl__HaltonSampler.hxx
deleted file mode 100644
index 7fe4fee18e03..000000000000
--- a/cad/py-ocp/files/patch-OCCT_OpenGl__HaltonSampler.hxx
+++ /dev/null
@@ -1,11 +0,0 @@
---- OCCT/OpenGl_HaltonSampler.hxx.orig	2020-06-15 08:29:45 UTC
-+++ OCCT/OpenGl_HaltonSampler.hxx
-@@ -180,7 +180,7 @@ void OpenGl_HaltonSampler::initRandom (Random_number_g
-     {
-       aPerms[aBase][i] = i;
-     }
--    std::random_shuffle (aPerms[aBase].begin(), aPerms[aBase].end(), theRand);
-+    std::shuffle (aPerms[aBase].begin(), aPerms[aBase].end(), theRand);
-   }
-   initTables (aPerms);
- }