diff --git a/dbus-listener.js b/dbus-listener.js
index 8cb31b4..2be8537 100644
--- a/dbus-listener.js
+++ b/dbus-listener.js
@@ -78,8 +78,10 @@ module.exports = function (app, messageCallback, address, plugin, pollInterval)
             // a process to manage settings on the dbus, the logger to VRM Portal
             // and others. All services that send out data for connected devices do
             // have the /DeviceInstance path.
-            app.debug(`warning: error getting device instance for ${name}`)
-            services[owner].deviceInstance = 99
+            if ( services[owner] ) {
+              app.debug(`warning: error getting device instance for ${name}`)
+              services[owner].deviceInstance = 99
+            }
           } else {
             services[owner].deviceInstance = res[1][0]
           }