diff --git a/akka-stream/src/main/scala/akka/stream/impl/ActorMaterializerImpl.scala b/akka-stream/src/main/scala/akka/stream/impl/ActorMaterializerImpl.scala
index ab446e9c62..340fe809f3 100644
--- a/akka-stream/src/main/scala/akka/stream/impl/ActorMaterializerImpl.scala
+++ b/akka-stream/src/main/scala/akka/stream/impl/ActorMaterializerImpl.scala
@@ -17,7 +17,7 @@ import scala.concurrent.duration.FiniteDuration
 import scala.concurrent.{ Await, ExecutionContextExecutor }
 
 /**
- * ExtendedActorMaterializer used by subtypes which materializer using GraphInterpreterShell
+ * ExtendedActorMaterializer used by subtypes which delegates in-island wiring to [[akka.stream.impl.PhaseIsland]]s
  */
 @DoNotInherit private[akka] abstract class ExtendedActorMaterializer extends ActorMaterializer {