diff --git a/math/geogram/Makefile b/math/geogram/Makefile
index 28fe8f5ecca6..879a82366c9c 100644
--- a/math/geogram/Makefile
+++ b/math/geogram/Makefile
@@ -1,28 +1,32 @@
 PORTNAME=	geogram
 DISTVERSIONPREFIX=	v
 DISTVERSION=	1.7.7
 CATEGORIES=	math
 
 MAINTAINER=	yuri@FreeBSD.org
 COMMENT=	Programming library of geometric algorithms
 
 LICENSE=	BSD3CLAUSE
 LICENSE_FILE=	${WRKSRC}/doc/devkit/license.dox
 
+ONLY_FOR_ARCHS=	amd64 i386
+ONLY_FOR_ARCHS_REASON=	use of inline assembly for these architectures only, at least in src/lib/geogram/basic/atomics.h
+
 LIB_DEPENDS=	libglfw.so:graphics/glfw
 
 USES=		cmake gl localbase:ldflags xorg
 USE_XORG=	x11 xcursor xi xinerama xrandr xxf86vm
 USE_GL=		gl glu
 USE_LDCONFIG=	yes
 
 USE_GITHUB=	yes
 GH_ACCOUNT=	alicevision
 
 CMAKE_ON=	GEOGRAM_USE_SYSTEM_GLFW3 VORPALINE_BUILD_DYNAMIC
 CMAKE_ARGS=	-DVORPALINE_PLATFORM:STRING=FreeBSD
+
 CFLAGS+=	-fcommon # https://github.com/alicevision/geogram/issues/16
 CXXFLAGS+=	-fcommon # https://github.com/alicevision/geogram/issues/16
 LDFLAGS+=	-pthread
 
 .include <bsd.port.mk>