diff --git a/graphics/libboard/Makefile b/graphics/libboard/Makefile
index c98032d40f60..c1f351adfa78 100644
--- a/graphics/libboard/Makefile
+++ b/graphics/libboard/Makefile
@@ -13,9 +13,8 @@ LICENSE=	LGPL3
 BUILD_DEPENDS=	doxygen:devel/doxygen
 LIB_DEPENDS=	libMagick++-6.so:graphics/ImageMagick
 
-BROKEN_FreeBSD_9=	does not build
-
 HAS_CONFIGURE=	yes
+CXXFLAGS+=	-D_GLIBCXX_USE_C99 # XXX ports/193528
 CONFIGURE_ARGS=	--prefix=${PREFIX}
 CONFIGURE_ENV=	CXX=${CXX}