diff --git a/include/transport/networkplugin.h b/include/transport/networkplugin.h
index 6c4ababdf0fcf0ef020d6f2182cfbfd8356d4ba8..a5e123f79b733f018c8f4a6d3fe4e2d59904d185 100644
--- a/include/transport/networkplugin.h
+++ b/include/transport/networkplugin.h
@@ -35,6 +35,7 @@ namespace Transport {
 /// development.
 class NetworkPlugin {
 	public:
+		enum ExitCode { StorageBackendNeeded = -2 };
 
 		class PluginConfig {
 			public: