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diff --git a/src/utils/bool_translator.hpp b/src/utils/bool_translator.hpp
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+/*
+ * UltraStar Deluxe - Karaoke Game
+ *
+ * UltraStar Deluxe is the legal property of its developers, whose names
+ * are too numerous to list here. Please refer to the COPYRIGHT
+ * file distributed with this source distribution.
+ *
+ * This program 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 2
+ * of the License, or (at your option) any later version.
+ *
+ * This program 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 this program; see the file COPYING. If not, write to
+ * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
+ * Boston, MA 02110-1301, USA.
+ *
+ */
+
+#ifndef BOOL_TRANSLATOR_HPP
+#define BOOL_TRANSLATOR_HPP
+
+#include <boost/algorithm/string/predicate.hpp>
+
+namespace usdx
+{
+	struct BoolTranslator
+	{
+		typedef std::string internal_type;
+		typedef bool external_type;
+
+		boost::optional<external_type> get_value(const internal_type& str)
+		{
+			if (!str.empty())
+			{
+				if (boost::algorithm::iequals(str, "true")
+					|| boost::algorithm::iequals(str, "yes")
+					|| str == "1")
+					return boost::optional<external_type>(true);
+				else
+					return boost::optional<external_type>(false);
+			}
+			else
+				return boost::optional<external_type>(boost::none);
+		}
+
+		boost::optional<internal_type> put_value(const external_type& b)
+		{
+			return boost::optional<internal_type>(b ? "true" : "false");
+		}
+	};
+};
+
+namespace boost {
+	namespace property_tree {
+
+		template<typename Ch, typename Traits, typename Alloc>
+		struct translator_between<std::basic_string< Ch, Traits, Alloc >, bool>
+		{
+			typedef usdx::BoolTranslator type;
+		};
+
+	};
+};
+
+#endif