diff -ru ruby-freedb.orig/Makefile ruby-freedb/Makefile
--- ruby-freedb.orig/Makefile	2011-04-18 07:03:06.000000000 +0100
+++ ruby-freedb/Makefile	2011-04-18 07:07:12.000000000 +0100
@@ -25,6 +25,9 @@
 DOCS=		CHANGELOG	README	doc
 EXAMPLES=	examples/*.rb
 
+post-patch:
+	${REINPLACE_CMD} -E -e "s,RSTRING\(([^)]+)\)->ptr,RSTRING_PTR(\1),g" ${WRKSRC}/freedb_cdrom.c
+
 post-install:
 .if !defined(NOPORTDOCS)
 	${MKDIR} ${RUBY_MODDOCDIR}