diff --git a/devel/sunpromake/Makefile b/devel/sunpromake/Makefile
index 0cdb1edfd52e..9ca93ca36049 100644
--- a/devel/sunpromake/Makefile
+++ b/devel/sunpromake/Makefile
@@ -1,22 +1,24 @@
 PORTNAME=	sunpromake
 CATEGORIES=	devel parallel
 
 COMMENT=	Parallel-execution enabled SunOS make program, enhanced to fit POSIX
 WWW=		http://schilytools.sourceforge.net/sunpromake.html
 
 USE_LDCONFIG=	yes
 
 CONFLICTS=	dmake
 
 MASTERDIR=	${.CURDIR}/../../devel/schilybase
 COMPONENTS=	sunpro
 
+CXXFLAGS+=	-Wno-register
+
 # these libraries are installed by the sunpro component
 # but are internal to the program.  The author recommends
 # not shipping them, so we don't.
 post-install:
 	${RM} ${STAGEDIR}${PREFIX}/lib/libbsd.a
 	${RM} ${STAGEDIR}${PREFIX}/lib/libmksh.a
 	${RM} ${STAGEDIR}${PREFIX}/lib/libvroot.a
 
 .include "${MASTERDIR}/Makefile.master"