diff --git a/maddy.go b/maddy.go
index 418afbe..963afcb 100644
--- a/maddy.go
+++ b/maddy.go
@@ -29,6 +29,7 @@ func Start(cfg []config.Node) error {
 	globals.String("hostname", false, false, "", nil)
 	globals.String("autogenerated_msg_domain", false, false, "", nil)
 	globals.Custom("tls", false, false, nil, config.TLSDirective, nil)
+	globals.Bool("storage_perdomain", false, false, nil)
 	globals.Bool("auth_perdomain", false, false, nil)
 	globals.StringList("auth_domains", false, false, nil, nil)
 	globals.Custom("log", false, false, defaultLogOutput, logOutput, &log.DefaultLogger.Out)