diff --git a/audio/libsidplay/Makefile b/audio/libsidplay/Makefile
index 02281e5b4dcb..67081ebb6686 100644
--- a/audio/libsidplay/Makefile
+++ b/audio/libsidplay/Makefile
@@ -1,27 +1,33 @@
 PORTNAME=	libsidplay
 PORTVERSION=	1.36.60
 PORTREVISION=	1
 CATEGORIES=	audio emulators
 MASTER_SITES=	DEBIAN
 DISTNAME=	${PORTNAME}_${DISTVERSION}${DISTVERSIONSUFFIX}.orig
 
 MAINTAINER=	ehaupt@FreeBSD.org
 COMMENT=	Commodore SID-chip emulator library to play SID music files
 
 LICENSE=	GPLv2
 LICENSE_FILE=	${WRKSRC}/COPYING
 
 USES=		autoreconf libtool tar:bz2
 USE_LDCONFIG=	yes
 
 GNU_CONFIGURE=	yes
 CONFIGURE_ARGS=	${CONFIGURE_ARGS_${ARCH}}
 CONFIGURE_ENV=	sid_cv_have_ios_binary=yes
 
 INSTALL_TARGET=	install-strip
 
 WRKSRC=		${WRKDIR}/${PORTNAME}-${PORTVERSION}
 
 CONFIGURE_ARGS_i386=	--enable-optendian --enable-optfixpoint
 
+.include <bsd.port.options.mk>
+
+.if ${OPSYS} == FreeBSD && ${OSVERSION} >= 1400091
+CPPFLAGS+=  -Dregister=
+.endif
+
 .include <bsd.port.mk>