--- ext/tidy/tidy.c.orig
+++ ext/tidy/tidy.c
@@ -31,7 +31,7 @@
#include "ext/standard/info.h"
#include "tidy.h"
-#include "buffio.h"
+#include "tidybuffio.h"
/* compatibility with older versions of libtidy */
#ifndef TIDY_CALL