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diff --git a/boost/parameter/aux_/preprocessor/convert_binary_seq.hpp b/boost/parameter/aux_/preprocessor/convert_binary_seq.hpp
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+++ b/boost/parameter/aux_/preprocessor/convert_binary_seq.hpp
@@ -0,0 +1,57 @@
+// Copyright Cromwell D. Enage 2013.
+// Distributed under the Boost Software License, Version 1.0.
+// (See accompanying file LICENSE_1_0.txt or copy at
+// http://www.boost.org/LICENSE_1_0.txt)
+
+#ifndef BOOST_PARAMETER_AUX_PREPROCESSOR_CONVERT_BINARY_SEQ_HPP
+#define BOOST_PARAMETER_AUX_PREPROCESSOR_CONVERT_BINARY_SEQ_HPP
+
+#include <boost/preprocessor/seq/size.hpp>
+#include <boost/preprocessor/seq/push_back.hpp>
+
+#define BOOST_PARAMETER_AUX_PP_AUGMENT_BINARY_SEQ_INDEX_FOLD_OP(s, seq, idx) \
+    BOOST_PP_SEQ_PUSH_BACK(seq, (idx, BOOST_PP_SEQ_SIZE(seq)))
+/**/
+
+#include <boost/preprocessor/control/iif.hpp>
+#include <boost/preprocessor/seq/elem.hpp>
+#include <boost/preprocessor/tuple/elem.hpp>
+
+#define BOOST_PARAMETER_AUX_PP_CONVERT_BINARY_SEQ_FOLD_OP(s, seq, elem) \
+    ( \
+        BOOST_PP_SEQ_PUSH_BACK( \
+            BOOST_PP_SEQ_ELEM(0, seq) \
+          , BOOST_PP_IIF( \
+                BOOST_PP_TUPLE_ELEM(2, 0, elem) \
+              , BOOST_PP_SEQ_ELEM(2, seq) \
+              , BOOST_PP_SEQ_ELEM(1, seq) \
+            )(BOOST_PP_TUPLE_ELEM(2, 1, elem), BOOST_PP_SEQ_ELEM(3, seq)) \
+        ) \
+    )(BOOST_PP_SEQ_ELEM(1, seq))(BOOST_PP_SEQ_ELEM(2, seq)) \
+    (BOOST_PP_SEQ_ELEM(3, seq))
+/**/
+
+#include <boost/parameter/aux_/preprocessor/seq_enum.hpp>
+#include <boost/preprocessor/facilities/empty.hpp>
+#include <boost/preprocessor/seq/seq.hpp>
+#include <boost/preprocessor/seq/fold_left.hpp>
+
+#define BOOST_PARAMETER_AUX_PP_CONVERT_BINARY_SEQ(seq, macro0, macro1, data) \
+    BOOST_PARAMETER_SEQ_ENUM( \
+        BOOST_PP_SEQ_ELEM( \
+            0 \
+          , BOOST_PP_SEQ_FOLD_LEFT( \
+                BOOST_PARAMETER_AUX_PP_CONVERT_BINARY_SEQ_FOLD_OP \
+              , (BOOST_PP_SEQ_NIL)(macro0)(macro1)(data) \
+              , BOOST_PP_SEQ_FOLD_LEFT( \
+                    BOOST_PARAMETER_AUX_PP_AUGMENT_BINARY_SEQ_INDEX_FOLD_OP \
+                  , BOOST_PP_EMPTY() \
+                  , seq \
+                ) \
+            ) \
+        ) \
+    )
+/**/
+
+#endif  // include guard
+