Index: head/multimedia/mswebrtc/Makefile
===================================================================
--- head/multimedia/mswebrtc/Makefile	(revision 495220)
+++ head/multimedia/mswebrtc/Makefile	(revision 495221)
@@ -1,24 +1,27 @@
 # $FreeBSD$
 
 PORTNAME=	mswebrtc
 PORTVERSION=	1.1.1
 PORTREVISION=	1
 CATEGORIES=	multimedia net
 MASTER_SITES=	https://www.linphone.org/releases/sources/plugins/mswebrtc/
 
 MAINTAINER=	ports@FreeBSD.org
 COMMENT=	Mediastreamer plugin with WebRTC codecs
 
 LICENSE=	GPLv2+
 LICENSE_FILE=	${WRKSRC}/COPYING
 
+NOT_FOR_ARCHS=		powerpc powerpc64 powerpcspe
+NOT_FOR_ARCHS_REASON=	Define either WEBRTC_ARCH_LITTLE_ENDIAN or WEBRTC_ARCH_BIG_ENDIAN
+
 LIB_DEPENDS=	libbctoolbox.so:net/bctoolbox \
 		libmediastreamer_base.so:net/mediastreamer \
 		libortp.so:net/ortp
 
 USES=		cmake compiler:c++11-lib
 
 CMAKE_ARGS=	-DENABLE_STATIC=NO
 PLIST_FILES=	lib/mediastreamer/plugins/libmswebrtc.so
 
 .include <bsd.port.mk>