Index: head/devel/simgear/Makefile
===================================================================
--- head/devel/simgear/Makefile	(revision 554992)
+++ head/devel/simgear/Makefile	(revision 554993)
@@ -1,35 +1,41 @@
 # $FreeBSD$
 
 PORTNAME=	simgear
 PORTVERSION=	2020.3.2
 CATEGORIES=	devel games
 MASTER_SITES=	SF/flightgear/release-${PORTVERSION:R}
 
 MAINTAINER=	martymac@FreeBSD.org
 COMMENT=	Toolkit for 3D games and simulations
 
 LICENSE=	GPLv2+ LGPL20+
 LICENSE_COMB=	multi
 LICENSE_FILE_LGPL20+ =	${WRKSRC}/COPYING
 
 BUILD_DEPENDS=	${LOCALBASE}/lib/libplibsl.a:x11-toolkits/plib
 RUN_DEPENDS=	${LOCALBASE}/lib/libplibsl.a:x11-toolkits/plib
 LIB_DEPENDS=	libboost_thread.so:devel/boost-libs \
 		libosg.so:graphics/osg \
 		libexpat.so:textproc/expat2 \
 		libcurl.so:ftp/curl
 
 USES=		alias cmake compiler:c++11-lib cpe gl jpeg openal:al,alut \
 		tar:bzip2 xorg
 USE_XORG=	ice sm x11 xext xi xmu xt
 USE_GL=		gl glu glut
 
 USE_LDCONFIG=	yes
 
 LDFLAGS_gcc=	-losgDB
 LDFLAGS+=	${LDFLAGS_${CHOSEN_COMPILER_TYPE}}
 
 CMAKE_ARGS+=	-DSYSTEM_EXPAT:BOOL=ON \
 		-DENABLE_TESTS:BOOL=OFF
 
-.include <bsd.port.mk>
+.include <bsd.port.pre.mk>
+
+.if ${ARCH} != amd64 && ${ARCH} != i386
+CMAKE_ARGS+=	-DENABLE_SIMD:BOOL=OFF
+.endif
+
+.include <bsd.port.post.mk>