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diff --git a/src/gui/ThreadedLoader.hpp b/src/gui/ThreadedLoader.hpp
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+++ b/src/gui/ThreadedLoader.hpp
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+/*
+  This file is part of Ingen.
+  Copyright 2007-2015 David Robillard <http://drobilla.net/>
+
+  Ingen is free software: you can redistribute it and/or modify it under the
+  terms of the GNU Affero General Public License as published by the Free
+  Software Foundation, either version 3 of the License, or any later version.
+
+  Ingen 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 Affero General Public License for details.
+
+  You should have received a copy of the GNU Affero General Public License
+  along with Ingen.  If not, see <http://www.gnu.org/licenses/>.
+*/
+
+#ifndef INGEN_GUI_THREADEDLOADER_HPP
+#define INGEN_GUI_THREADEDLOADER_HPP
+
+#include <thread>
+
+#include <cassert>
+#include <list>
+#include <mutex>
+#include <string>
+
+#include <boost/optional.hpp>
+
+#include "ingen/FilePath.hpp"
+#include "ingen/Interface.hpp"
+#include "ingen/Parser.hpp"
+#include "ingen/Serialiser.hpp"
+#include "raul/Semaphore.hpp"
+
+namespace Ingen {
+
+class URI;
+
+namespace GUI {
+
+/** Thread for loading graph files.
+ *
+ * This is a seperate thread so it can send all the loading message without
+ * blocking everything else, so the app can respond to the incoming events
+ * caused as a result of the graph loading, while the graph loads.
+ *
+ * Implemented as a slave with a list of closures (events) which processes
+ * all events in the (mutex protected) list each time it's whipped.
+ *
+ * \ingroup GUI
+ */
+class ThreadedLoader
+{
+public:
+	ThreadedLoader(App&            app,
+	               SPtr<Interface> engine);
+
+	~ThreadedLoader();
+
+	void load_graph(bool                          merge,
+	                const FilePath&               file_path,
+	                boost::optional<Raul::Path>   engine_parent,
+	                boost::optional<Raul::Symbol> engine_symbol,
+	                boost::optional<Properties>   engine_data);
+
+	void save_graph(SPtr<const Client::GraphModel> model, const URI& uri);
+
+	SPtr<Parser> parser();
+
+private:
+	void load_graph_event(const FilePath&               file_path,
+	                      boost::optional<Raul::Path>   engine_parent,
+	                      boost::optional<Raul::Symbol> engine_symbol,
+	                      boost::optional<Properties>   engine_data);
+
+	void save_graph_event(SPtr<const Client::GraphModel> model,
+	                      const URI&                     filename);
+
+	/** Returns nothing and takes no parameters (because they have all been bound) */
+	typedef sigc::slot<void> Closure;
+
+	void run();
+
+	App&               _app;
+	Raul::Semaphore    _sem;
+	SPtr<Interface>    _engine;
+	std::mutex         _mutex;
+	std::list<Closure> _events;
+	bool               _exit_flag;
+	std::thread        _thread;
+};
+
+} // namespace GUI
+} // namespace Ingen
+
+#endif // INGEN_GUI_LOADERRTHREAD_HPP