diff --git a/akka-actor-tests/src/test/scala/akka/dispatch/MailboxConfigSpec.scala b/akka-actor-tests/src/test/scala/akka/dispatch/MailboxConfigSpec.scala
index 21c6c75cb2..f4d355333a 100644
--- a/akka-actor-tests/src/test/scala/akka/dispatch/MailboxConfigSpec.scala
+++ b/akka-actor-tests/src/test/scala/akka/dispatch/MailboxConfigSpec.scala
@@ -144,8 +144,8 @@ class PriorityMailboxSpec extends MailboxSpec {
   val comparator = PriorityGenerator(_.##)
   lazy val name = "The priority mailbox implementation"
   def factory = {
-    case UnboundedMailbox()                    ⇒ UnboundedPriorityMailbox(comparator).create(None)
-    case BoundedMailbox(capacity, pushTimeOut) ⇒ BoundedPriorityMailbox(comparator, capacity, pushTimeOut).create(None)
+    case UnboundedMailbox()                    ⇒ new UnboundedPriorityMailbox(comparator).create(None)
+    case BoundedMailbox(capacity, pushTimeOut) ⇒ new BoundedPriorityMailbox(comparator, capacity, pushTimeOut).create(None)
   }
 }
 
diff --git a/akka-actor/src/main/scala/akka/dispatch/Mailbox.scala b/akka-actor/src/main/scala/akka/dispatch/Mailbox.scala
index 3099fe8f01..6ae7f3ddc7 100644
--- a/akka-actor/src/main/scala/akka/dispatch/Mailbox.scala
+++ b/akka-actor/src/main/scala/akka/dispatch/Mailbox.scala
@@ -380,14 +380,20 @@ case class BoundedMailbox( final val capacity: Int, final val pushTimeOut: Durat
     }
 }
 
-case class UnboundedPriorityMailbox( final val cmp: Comparator[Envelope]) extends MailboxType {
+/**
+ * Extend me to provide the comparator
+ */
+class UnboundedPriorityMailbox( final val cmp: Comparator[Envelope]) extends MailboxType {
   final override def create(owner: Option[ActorContext]): MessageQueue =
     new QueueBasedMessageQueue with UnboundedMessageQueueSemantics {
       final val queue = new PriorityBlockingQueue[Envelope](11, cmp)
     }
 }
 
-case class BoundedPriorityMailbox( final val cmp: Comparator[Envelope], final val capacity: Int, final val pushTimeOut: Duration) extends MailboxType {
+/**
+ * Extend me to provide the comparator
+ */
+class BoundedPriorityMailbox( final val cmp: Comparator[Envelope], final val capacity: Int, final val pushTimeOut: Duration) extends MailboxType {
 
   if (capacity < 0) throw new IllegalArgumentException("The capacity for BoundedMailbox can not be negative")
   if (pushTimeOut eq null) throw new IllegalArgumentException("The push time-out for BoundedMailbox can not be null")
diff --git a/akka-docs/scala/code/akka/docs/dispatcher/DispatcherDocSpec.scala b/akka-docs/scala/code/akka/docs/dispatcher/DispatcherDocSpec.scala
index fe8eb8a270..f26ac791d1 100644
--- a/akka-docs/scala/code/akka/docs/dispatcher/DispatcherDocSpec.scala
+++ b/akka-docs/scala/code/akka/docs/dispatcher/DispatcherDocSpec.scala
@@ -120,10 +120,7 @@ object DispatcherDocSpec {
   }
 
   // We create a new Priority dispatcher and seed it with the priority generator
-  class PrioMailbox(config: Config) extends MailboxType {
-    val priorityMailbox = UnboundedPriorityMailbox(generator)
-    def create(owner: Option[ActorContext]) = priorityMailbox.create(owner)
-  }
+  class PrioMailbox(config: Config) extends UnboundedPriorityMailbox(generator)
   //#prio-mailbox
 
   class MyActor extends Actor {