diff --git a/akka-actor/src/main/scala/akka/util/SubclassifiedIndex.scala b/akka-actor/src/main/scala/akka/util/SubclassifiedIndex.scala
index ae82da6407..565d50e636 100644
--- a/akka-actor/src/main/scala/akka/util/SubclassifiedIndex.scala
+++ b/akka-actor/src/main/scala/akka/util/SubclassifiedIndex.scala
@@ -55,7 +55,7 @@ private[akka] object SubclassifiedIndex {
   }
 
   private[SubclassifiedIndex] def emptyMergeMap[K, V] = internalEmptyMergeMap.asInstanceOf[Map[K, Set[V]]]
-  private[this] val internalEmptyMergeMap = Map[AnyRef, Set[AnyRef]]().withDefault(_ ⇒ Set[AnyRef]())
+  private[this] val internalEmptyMergeMap = Map[AnyRef, Set[AnyRef]]().withDefaultValue(Set[AnyRef]())
 }
 
 /**
diff --git a/akka-cluster/src/main/scala/akka/cluster/routing/ClusterRouterConfig.scala b/akka-cluster/src/main/scala/akka/cluster/routing/ClusterRouterConfig.scala
index bdbb1297fb..ef99ced2d8 100644
--- a/akka-cluster/src/main/scala/akka/cluster/routing/ClusterRouterConfig.scala
+++ b/akka-cluster/src/main/scala/akka/cluster/routing/ClusterRouterConfig.scala
@@ -202,7 +202,7 @@ private[akka] class ClusterRouteeProvider(
     } else {
       // find the node with least routees
       val numberOfRouteesPerNode: Map[Address, Int] =
-        currentRoutees.foldLeft(currentNodes.map(_ -> 0).toMap.withDefault(_ ⇒ 0)) { (acc, x) ⇒
+        currentRoutees.foldLeft(currentNodes.map(_ -> 0).toMap.withDefaultValue(0)) { (acc, x) ⇒
           val address = fullAddress(x)
           acc + (address -> (acc(address) + 1))
         }