diff --git a/akka-remote/src/main/scala/remote/RemoteClient.scala b/akka-remote/src/main/scala/remote/RemoteClient.scala
index a1b01a078f..e80c7936c2 100644
--- a/akka-remote/src/main/scala/remote/RemoteClient.scala
+++ b/akka-remote/src/main/scala/remote/RemoteClient.scala
@@ -310,13 +310,11 @@ class RemoteClient private[akka] (
         connection.getChannel.write(request)
         None
       } else {
-        futures.synchronized {
           val futureResult = if (senderFuture.isDefined) senderFuture.get
           else new DefaultCompletableFuture[T](request.getActorInfo.getTimeout)
           futures.put(uuidFrom(request.getUuid.getHigh, request.getUuid.getLow), futureResult)
           connection.getChannel.write(request)
           Some(futureResult)
-        }
       }
     } else {
       val exception = new RemoteClientException(