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diff --git a/gr-fec/include/fec/decode_ccsds_27_fb.h b/gr-fec/include/fec/decode_ccsds_27_fb.h
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+++ b/gr-fec/include/fec/decode_ccsds_27_fb.h
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+/* -*- c++ -*- */
+/*
+ * Copyright 2012 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_FEC_DECODE_CCSDS_27_FB_H
+#define INCLUDED_FEC_DECODE_CCSDS_27_FB_H
+
+#include <fec/api.h>
+#include <gr_sync_decimator.h>
+
+namespace gr {
+  namespace fec {
+
+    /*! \brief A rate 1/2, k=7 convolutional decoder for the CCSDS standard
+     * \ingroup ecc
+     *
+     * This block performs soft-decision convolutional decoding using the Viterbi
+     * algorithm.
+     *
+     * The input is a stream of (possibly noise corrupted) floating point values
+     * nominally spanning [-1.0, 1.0], representing the encoded channel symbols
+     * 0 (-1.0) and 1 (1.0), with erased symbols at 0.0.
+     *
+     * The output is MSB first packed bytes of decoded values.
+     *
+     * As a rate 1/2 code, there will be one output byte for every 16 input symbols.
+     *
+     * This block is designed for continuous data streaming, not packetized data.
+     * The first 32 bits out will be zeroes, with the output delayed four bytes
+     * from the corresponding inputs.
+     */
+    
+    class FEC_API decode_ccsds_27_fb : virtual public gr_sync_decimator
+    {
+    public:
+      
+      // gr::fec::decode_ccsds_27_fb::sptr
+      typedef boost::shared_ptr<decode_ccsds_27_fb> sptr;
+
+      static sptr make();
+    };
+
+  } /* namespace fec */
+} /* namespace gr */
+
+#endif /* INCLUDED_FEC_DECODE_CCSDS_27_FB_H */