diff --git a/dart/lib/echo_client.dart b/dart/lib/echo_client.dart
index a639253..d9239b7 100644
--- a/dart/lib/echo_client.dart
+++ b/dart/lib/echo_client.dart
@@ -10,16 +10,15 @@
 
 class EchoClient {
   final mojom.EchoProxy _proxy;
-  final String _url;
 
   Future close({bool immediate: false}) {
     return _proxy.close(immediate: immediate);
   }
 
-  EchoClient(ConnectToServiceFn cts, this._url)
+  EchoClient(ConnectToServiceFn cts, String url)
       : _proxy = new mojom.EchoProxy.unbound() {
-    print('connecting to $_url');
-    cts(_url, _proxy);
+    print('connecting to $url');
+    cts(url, _proxy);
     print('connected');
   }
 
diff --git a/sky_echo/lib/main.dart b/sky_echo/lib/main.dart
index 3c92aa9..0838e0c 100644
--- a/sky_echo/lib/main.dart
+++ b/sky_echo/lib/main.dart
@@ -7,7 +7,7 @@
 
 log(String msg) {
   DateTime now = new DateTime.now();
-  print('${now.toString()} $msg');
+  print('$now $msg');
 }
 
 class EchoApp extends App {
@@ -15,7 +15,7 @@
 
   EchoApp()
       : _c = new EchoClient(
-            embedder.connectToService, 'https://mojo.v.io/echo_server.mojo') {}
+            embedder.connectToService, 'https://mojo.v.io/echo_server.mojo');
 
   int seq = 0;
   String sendMsg = '';