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diff --git a/boost/compute/lambda/placeholder.hpp b/boost/compute/lambda/placeholder.hpp
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+++ b/boost/compute/lambda/placeholder.hpp
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+//---------------------------------------------------------------------------//
+// Copyright (c) 2013-2014 Kyle Lutz <kyle.r.lutz@gmail.com>
+//
+// 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
+//
+// See http://boostorg.github.com/compute for more information.
+//---------------------------------------------------------------------------//
+
+#ifndef BOOST_COMPUTE_LAMBDA_PLACEHOLDER_HPP
+#define BOOST_COMPUTE_LAMBDA_PLACEHOLDER_HPP
+
+namespace boost {
+namespace compute {
+namespace lambda {
+
+// lambda placeholder type
+template<int I>
+struct placeholder
+{
+};
+
+} // end lambda namespace
+} // end compute namespace
+} // end boost namespace
+
+#endif // BOOST_COMPUTE_LAMBDA_PLACEHOLDER_HPP