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diff --git a/libevmasm/LinkerObject.h b/libevmasm/LinkerObject.h
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+/*
+	This file is part of cpp-ethereum.
+
+	cpp-ethereum 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 of the License, or
+	(at your option) any later version.
+
+	cpp-ethereum 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 cpp-ethereum.  If not, see <http://www.gnu.org/licenses/>.
+*/
+/** @file Assembly.h
+ * @author Gav Wood <i@gavwood.com>
+ * @date 2014
+ */
+
+#pragma once
+
+#include <libdevcore/Common.h>
+#include <libdevcore/FixedHash.h>
+
+namespace dev
+{
+namespace eth
+{
+
+/**
+ * Binary object that potentially still needs to be linked (i.e. addresses of other contracts
+ * need to be filled in).
+ */
+struct LinkerObject
+{
+	bytes bytecode;
+	/// Map from offsets in bytecode to library identifiers. The addresses starting at those offsets
+	/// need to be replaced by the actual addresses by the linker.
+	std::map<size_t, std::string> linkReferences;
+
+	/// Appends the bytecode of @a _other and incorporates its link references.
+	void append(LinkerObject const& _other);
+
+	/// Links the given libraries by replacing their uses in the code and removes them from the references.
+	void link(std::map<std::string, h160> const& _libraryAddresses);
+
+	/// @returns a hex representation of the bytecode of the given object, replacing unlinked
+	/// addresses by placeholders.
+	std::string toHex() const;
+};
+
+}
+}