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diff --git a/gr-blocks/include/blocks/annotator_1to1.h b/gr-blocks/include/blocks/annotator_1to1.h
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+++ b/gr-blocks/include/blocks/annotator_1to1.h
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+/* -*- c++ -*- */
+/*
+ * Copyright 2010,2013 Free Software Foundation, Inc.
+ *
+ * This file is part of GNU Radio
+ *
+ * GNU Radio is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 3, or (at your option)
+ * any later version.
+ *
+ * GNU Radio is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with GNU Radio; see the file COPYING.  If not, write to
+ * the Free Software Foundation, Inc., 51 Franklin Street,
+ * Boston, MA 02110-1301, USA.
+ */
+
+#ifndef INCLUDED_GR_ANNOTATOR_1TO1_H
+#define	INCLUDED_GR_ANNOTATOR_1TO1_H
+
+#include <blocks/api.h>
+#include <gr_sync_block.h>
+
+namespace gr {
+  namespace blocks {
+
+    /*!
+     * \brief 1-to-1 stream annotator testing block. FOR TESTING PURPOSES ONLY.
+     *
+     * This block creates tags to be sent downstream every 10,000
+     * items it sees. The tags contain the name and ID of the
+     * instantiated block, use "seq" as a key, and have a counter that
+     * increments by 1 for every tag produced that is used as the
+     * tag's value. The tags are propagated using the 1-to-1 policy.
+     *
+     * It also stores a copy of all tags it sees flow past it. These
+     * tags can be recalled externally with the data() member.
+     *
+     * This block is only meant for testing and showing how to use the tags.
+     */
+    class BLOCKS_API annotator_1to1 : virtual public gr_sync_block
+    {
+    public:
+      // gr::blocks::annotator_1to1::sptr
+      typedef boost::shared_ptr<annotator_1to1> sptr;
+
+      static sptr make(int when, size_t sizeof_stream_item);
+
+      virtual std::vector<gr_tag_t> data() const = 0;
+    };
+
+  } /* namespace blocks */
+} /* namespace gr */
+
+#endif /* INCLUDED_GR_ANNOTATOR_1TO1_H */