diff --git a/emulators/xen-kernel/Makefile b/emulators/xen-kernel/Makefile
index efc7cb7c0727..8cc11b6ca75a 100644
--- a/emulators/xen-kernel/Makefile
+++ b/emulators/xen-kernel/Makefile
@@ -1,48 +1,48 @@
 # $FreeBSD$
 
 PORTNAME=	xen
 PKGNAMESUFFIX=	-kernel
 PORTVERSION=	4.5.0
 PORTREVISION=	1
 CATEGORIES=	emulators
 MASTER_SITES=	http://bits.xensource.com/oss-xen/release/${PORTVERSION}/
 
 MAINTAINER=	bapt@FreeBSD.org
 COMMENT=	Hypervisor using a microkernel design
 
 LICENSE=	GPLv2
 
 ONLY_FOR_ARCH=	amd64
 
-USES=		gmake python:build
+USES=		cpe gmake python:build
 MAKE_ARGS=	HOSTCC="${CC}" CC="${CC}" PYTHON=${PYTHON_CMD} \
 		NM="${NM}" LD="${LD}"
 USE_GCC=	yes
 NO_MTREE=	yes
 PLIST_FILES=	/boot/xen \
 		/boot/xen.4th
 ALL_TARGET=	build
 STRIP=		#
 WRKSRC_SUBDIR=	xen
 EXTRA_PATCHES=	${FILESDIR}/iommu_share_p2m_table.patch:-p2
 
 .include <bsd.port.options.mk>
 
 .if ${OPSYS} != FreeBSD
 IGNORE=		Only supported on FreeBSD
 .endif
 
 .if ${OSVERSION} < 1100055
 IGNORE=		Only supported on recent FreeBSD 11
 .endif
 
 do-install:
 	${MKDIR} ${STAGEDIR}/boot
 	${INSTALL_PROGRAM} ${WRKSRC}/xen ${STAGEDIR}/boot
 	${INSTALL_DATA} ${FILESDIR}/xen.4th ${STAGEDIR}/boot
 
 .include <bsd.port.mk>
 
 #Filter out LDFLAGS
 .undef LDFLAGS
 RUN_DEPENDS:=	${RUN_DEPENDS:N*gcc*}