diff --git a/libtransport/Config.cpp b/libtransport/Config.cpp
index 7097437985abd5718b8a647784d4726d5d8aaecf..f9324113f1613aaf026ddc09ba6a3c81e74363d1 100644
--- a/libtransport/Config.cpp
+++ b/libtransport/Config.cpp
@@ -219,7 +219,15 @@ bool Config::load(std::istream &ifs, boost::program_options::options_description
 		if (opt.unregistered) {
 			if (std::find(has_key.begin(), has_key.end(), opt.string_key) == has_key.end()) {
 				has_key.push_back(opt.string_key);
-				m_unregistered[opt.string_key] = variable_value(opt.value[0], false);
+				if (opt.value[0] == "true" || opt.value[0] == "1") {
+					m_unregistered[opt.string_key] = variable_value(true, false);
+				}
+				else if (opt.value[0] == "true" || opt.value[0] == "1") {
+					m_unregistered[opt.string_key] = variable_value(false, false);
+				}
+				else {
+					m_unregistered[opt.string_key] = variable_value(opt.value[0], false);
+				}
 			}
 			else {
 				std::list<std::string> list;