ngx_mruby.diff

diff --git src/http/ngx_http_mruby_filter.c src/http/ngx_http_mruby_filter.c
index 91e8e00..e90642d 100644
--- src/http/ngx_http_mruby_filter.c
+++ src/http/ngx_http_mruby_filter.c
@@ -34,7 +34,7 @@ static mrb_value ngx_mrb_set_filter_body(mrb_state *mrb, mrb_value self)
     body = mrb_funcall(mrb, body, "to_s", 0, NULL);
   }

-  ctx->body = (u_char *)mrb_str_to_cstr(mrb, body);
+  ctx->body = (u_char *)RSTRING_PTR(body);
   ctx->body_length = RSTRING_LEN(body);

   return mrb_fixnum_value(ctx->body_length);