diff --git a/Playback-states-&-service-states.md b/Playback-states-&-service-states.md
index 80628b6..711a712 100644
--- a/Playback-states-&-service-states.md
+++ b/Playback-states-&-service-states.md
@@ -1,7 +1,7 @@
 * **Service running**: Service is running, but startForeground was not called. 
 * **Service as Foreground**: Service is running, startForeground was called, Notification is shown
 * **stopForeground**: If we exit foreground, we can specify a flag, whether to remove, or to detach the notification. <br>If detached, the notification will stay, even when the service has been de-foregrounded
-
+* **registerMediaButtonReceiver**: With the newer architecture this is only possible if we have a service