diff --git a/akka-docs/rst/scala/stream/migration-guide-2.0-2.4-scala.rst b/akka-docs/rst/scala/stream/migration-guide-2.0-2.4-scala.rst
index 9d7f4d5bd7..e7c56e3028 100644
--- a/akka-docs/rst/scala/stream/migration-guide-2.0-2.4-scala.rst
+++ b/akka-docs/rst/scala/stream/migration-guide-2.0-2.4-scala.rst
@@ -40,6 +40,14 @@ needs to be changed into::
 These changes apply to all the places where streams are used, which means that signatures
 in the persistent query APIs also are affected.
 
+Removed ImplicitMaterializer
+============================
+
+The helper trait :class:`ImplicitMaterializer` has been removed as it was hard to find and the feature was not worth
+the extra trait. Defining an implicit materializer inside an enclosing actor can be done this way::
+
+    final implicit val materializer: ActorMaterializer = ActorMaterializer(ActorMaterializerSettings(context.system))
+
 Changed Operators
 =================