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diff --git a/gnuradio-core/src/lib/general/gr_copy.h b/gnuradio-core/src/lib/general/gr_copy.h
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+++ b/gnuradio-core/src/lib/general/gr_copy.h
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+/* -*- c++ -*- */
+/*
+ * Copyright 2006,2009 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_COPY_H
+#define INCLUDED_GR_COPY_H
+
+#include <gr_core_api.h>
+#include <gr_block.h>
+
+class gr_copy;
+typedef boost::shared_ptr<gr_copy> gr_copy_sptr;
+
+GR_CORE_API gr_copy_sptr gr_make_copy(size_t itemsize);
+
+/*!
+ * \brief output[i] = input[i]
+ * \ingroup misc_blk
+ *
+ * When enabled (default), this block copies its input to its output.
+ * When disabled, this block drops its input on the floor.
+ *
+ */
+class GR_CORE_API gr_copy : public gr_block
+{
+  size_t		d_itemsize;
+  bool			d_enabled;
+
+  friend GR_CORE_API gr_copy_sptr gr_make_copy(size_t itemsize);
+  gr_copy(size_t itemsize);
+
+ public:
+
+  bool check_topology(int ninputs, int noutputs);
+
+  void set_enabled(bool enable) { d_enabled = enable; }
+  bool enabled() const { return d_enabled;}
+
+  int general_work(int noutput_items,
+		   gr_vector_int &ninput_items,
+		   gr_vector_const_void_star &input_items,
+		   gr_vector_void_star &output_items);
+};
+
+#endif