diff --git a/src/config.cpp b/src/config.cpp
index e9d31872e0183eed2522098a93806736122698fa..86078320bebc78cb896b68dfdd55007258357b8a 100644
--- a/src/config.cpp
+++ b/src/config.cpp
@@ -75,6 +75,7 @@ bool Config::load(std::istream &ifs, boost::program_options::options_description
 		("service.backend", value<std::string>()->default_value("libpurple_backend"), "Backend")
 		("service.protocol", value<std::string>()->default_value(""), "Protocol")
 		("service.pidfile", value<std::string>()->default_value("/var/run/spectrum2/$jid.pid"), "Full path to pid file")
+		("service.portfile", value<std::string>()->default_value("/var/run/spectrum2/$jid.port"), "File to store backend_port to. It's used by spectrum2_manager.")
 		("service.working_dir", value<std::string>()->default_value("/var/lib/spectrum2/$jid"), "Working dir")
 		("service.allowed_servers", value<std::vector<std::string> >()->multitoken(), "Only users from these servers can connect")
 		("service.server_mode", value<bool>()->default_value(false), "True if Spectrum should behave as server")