diff --git a/config/akka-reference.conf b/config/akka-reference.conf
index 5a1c33497b..d59134d909 100644
--- a/config/akka-reference.conf
+++ b/config/akka-reference.conf
@@ -51,7 +51,7 @@
     <cluster>
       service = on # FIXME add 'service = on' for <cluster>
       name = "default"                                                       # The name of the cluster
-      #actor = "se.scalablesolutions.akka.remote.JGroupsClusterActor"         # FQN of an implementation of ClusterActor
+      actor = "se.scalablesolutions.akka.remote.JGroupsClusterActor"         # FQN of an implementation of ClusterActor
       serializer = "se.scalablesolutions.akka.serialization.Serializer$Java" # FQN of the serializer class
     </cluster>