diff --git a/sync/src/lib.rs b/sync/src/lib.rs
index 0b95f0b92..f1b1bb0b2 100644
--- a/sync/src/lib.rs
+++ b/sync/src/lib.rs
@@ -45,7 +45,7 @@
 //! 	let mut service = NetworkService::start(NetworkConfiguration::new()).unwrap();
 //! 	let dir = env::temp_dir();
 //! 	let client = Client::new(ClientConfig::default(), ethereum::new_frontier(), &dir, service.io().channel());
-//! 	let miner = Miner::new(false);
+//! 	let miner = Miner::new(false, ethereum::new_frontier());
 //! 	EthSync::register(&mut service, SyncConfig::default(), client, miner);
 //! }
 //! ```
diff --git a/sync/src/tests/helpers.rs b/sync/src/tests/helpers.rs
index 269362064..76f8b220e 100644
--- a/sync/src/tests/helpers.rs
+++ b/sync/src/tests/helpers.rs
@@ -93,7 +93,7 @@ impl TestNet {
 		for _ in 0..n {
 			net.peers.push(TestPeer {
 				chain: TestBlockChainClient::new(),
-				sync: ChainSync::new(SyncConfig::default(), Miner::new(false)),
+				sync: ChainSync::new(SyncConfig::default(), Arc::new(Miner::default())),
 				queue: VecDeque::new(),
 			});
 		}