diff --git a/spectrum_manager/src/methods.h b/spectrum_manager/src/methods.h
index 401cd115766f534d5487e04ff7aa82368e52c784..34ac270b8951df52b4258c512ce4068318323c6a 100644
--- a/spectrum_manager/src/methods.h
+++ b/spectrum_manager/src/methods.h
@@ -44,7 +44,7 @@ unsigned long exec_(std::string path, std::string config, std::string jid = "");
 int getPort(const std::string &portfile);
 
 int isRunning(const std::string &pidfile);
-void start_instances(ManagerConfig *config, const std::string &_jid = "");
+int start_instances(ManagerConfig *config, const std::string &_jid = "");
 void stop_instances(ManagerConfig *config, const std::string &_jid = "");
 
 int show_status(ManagerConfig *config);