diff --git a/akka-actor/src/main/scala/akka/dispatch/MessageHandling.scala b/akka-actor/src/main/scala/akka/dispatch/MessageHandling.scala
index ae9d3f1ff9..42caa4fca8 100644
--- a/akka-actor/src/main/scala/akka/dispatch/MessageHandling.scala
+++ b/akka-actor/src/main/scala/akka/dispatch/MessageHandling.scala
@@ -127,6 +127,10 @@ trait MessageDispatcher {
       }
     }
 
+  /**
+   * Only "private[akka] for the sake of intercepting calls, DO NOT CALL THIS OUTSIDE OF THE DISPATCHER,
+   * and only call it under the dispatcher-guard, see "attach" for the only invocation
+   */
   private[akka] def register(actorRef: ActorRef) {
     if (actorRef.mailbox eq null)
       actorRef.mailbox = createMailbox(actorRef)
@@ -139,6 +143,10 @@ trait MessageDispatcher {
     }
   }
 
+  /**
+   * Only "private[akka] for the sake of intercepting calls, DO NOT CALL THIS OUTSIDE OF THE DISPATCHER,
+   * and only call it under the dispatcher-guard, see "detach" for the only invocation
+   */
   private[akka] def unregister(actorRef: ActorRef) = {
     if (uuids remove actorRef.uuid) {
       cleanUpMailboxFor(actorRef)