diff --git a/src/emqttd_app.erl b/src/emqttd_app.erl
index 5f4e51da6..366df60cb 100644
--- a/src/emqttd_app.erl
+++ b/src/emqttd_app.erl
@@ -88,7 +88,7 @@ start_servers(Sup) ->
                {"emqttd mode supervisor", emqttd_mod_sup},
                {"emqttd bridge supervisor", {supervisor, emqttd_bridge_sup}},
                {"emqttd access control", emqttd_access_control},
-               {"emqttd system monitor", emqttd_sysmon}],
+               {"emqttd system monitor", emqttd_sysmon, emqttd:env(sysmon)}],
     [start_server(Sup, Server) || Server <- Servers].
 
 start_server(_Sup, {Name, F}) when is_function(F) ->