diff --git a/ethcore/src/client/client.rs b/ethcore/src/client/client.rs
index d5e509e62..99617023a 100644
--- a/ethcore/src/client/client.rs
+++ b/ethcore/src/client/client.rs
@@ -348,7 +348,7 @@ impl Client {
 		imported
 	}
 
-	fn commit_block<B>(&self, block: B, hash: &H256, block_data: &Bytes) -> ImportRoute where B: IsBlock + Drain {
+	fn commit_block<B>(&self, block: B, hash: &H256, block_data: &[u8]) -> ImportRoute where B: IsBlock + Drain {
 		let number = block.header().number();
 		// Are we committing an era?
 		let ancient = if number >= HISTORY {
diff --git a/ethcore/src/miner/work_notify.rs b/ethcore/src/miner/work_notify.rs
index a153be79f..ba45e5b70 100644
--- a/ethcore/src/miner/work_notify.rs
+++ b/ethcore/src/miner/work_notify.rs
@@ -52,10 +52,10 @@ impl WorkPoster {
 	}
 
 	fn create_client() -> Client<PostHandler> {
-		let client = Client::<PostHandler>::configure()
+		Client::<PostHandler>::configure()
 			.keep_alive(true)
-			.build().expect("Error creating HTTP client") as Client<PostHandler>;
-		client
+			.build()
+			.expect("Error creating HTTP client")
 	}
 
 	pub fn notify(&self, pow_hash: H256, difficulty: U256, number: u64) {
diff --git a/util/bigint/src/uint.rs b/util/bigint/src/uint.rs
index 2b9863135..1ea03679a 100644
--- a/util/bigint/src/uint.rs
+++ b/util/bigint/src/uint.rs
@@ -43,7 +43,7 @@ use std::cmp;
 
 use std::str::{FromStr};
 use std::convert::From;
-use std::hash::{Hash, Hasher};
+use std::hash::Hash;
 use std::ops::*;
 use std::cmp::*;
 
diff --git a/util/src/network/host.rs b/util/src/network/host.rs
index a48d1544c..a8bbc17e5 100644
--- a/util/src/network/host.rs
+++ b/util/src/network/host.rs
@@ -539,7 +539,7 @@ impl<Message> Host<Message> where Message: Send + Sync + Clone {
 		self.info.write().unwrap().public_endpoint = Some(public_endpoint.clone());
 
 		if self.first_time.load(AtomicOrdering::Relaxed) {
-			info!("Public node URL: {}", paint(White.bold(), format!("{}", self.external_url().unwrap())));
+			info!("Public node URL: {}", paint(White.bold(), self.external_url().unwrap()));
 			self.first_time.store(false, AtomicOrdering::Relaxed);
 		}