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diff --git a/ingen/Log.hpp b/ingen/Log.hpp
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+/*
+  This file is part of Ingen.
+  Copyright 2007-2016 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_LOG_HPP
+#define INGEN_LOG_HPP
+
+#include "ingen/LV2Features.hpp"
+#include "ingen/fmt.hpp"
+#include "ingen/ingen.h"
+#include "ingen/types.hpp"
+#include "lv2/core/lv2.h"
+#include "lv2/log/log.h"
+#include "lv2/urid/urid.h"
+
+#include <cstdarg>
+#include <cstdio>
+#include <functional>
+#include <string>
+#include <utility>
+
+namespace ingen {
+
+class Node;
+class URIs;
+class World;
+
+class INGEN_API Log {
+public:
+	typedef std::function<int(LV2_URID, const char*, va_list)> Sink;
+
+	Log(LV2_Log_Log* log, URIs& uris);
+
+	struct Feature : public LV2Features::Feature {
+		const char* uri() const override { return LV2_LOG__log; }
+
+		SPtr<LV2_Feature> feature(World& world, Node* block) override;
+
+		struct Handle {
+			LV2_Log_Log lv2_log;
+			Log*        log;
+			Node*       node;
+		};
+	};
+
+	void rt_error(const char* msg);
+
+	void error(const std::string& msg);
+	void info(const std::string& msg);
+	void warn(const std::string& msg);
+	void trace(const std::string& msg);
+
+	template <typename... Args>
+	void error(const char* format, Args&&... args)
+	{
+		error(fmt(format, std::forward<Args>(args)...));
+	}
+
+	template <typename... Args>
+	void info(const char* format, Args&&... args)
+	{
+		info(fmt(format, std::forward<Args>(args)...));
+	}
+
+	template <typename... Args>
+	void warn(const char* format, Args&&... args)
+	{
+		warn(fmt(format, std::forward<Args>(args)...));
+	}
+
+	template <typename... Args>
+	void trace(const char* format, Args&&... args)
+	{
+		trace(fmt(format, std::forward<Args>(args)...));
+	}
+
+	int vtprintf(LV2_URID type, const char* format, va_list args);
+
+	void set_flush(bool f) { _flush = f; }
+	void set_trace(bool f) { _trace = f; }
+	void set_sink(Sink s)  { _sink = s; }
+
+private:
+	void print(FILE* stream, const std::string& msg);
+
+	LV2_Log_Log* _log;
+	URIs&        _uris;
+	Sink         _sink;
+	bool         _flush;
+	bool         _trace;
+};
+
+} // namespace ingen
+
+#endif  // INGEN_LOG_HPP