diff --git a/sync/src/chain.rs b/sync/src/chain.rs
index 8e2b9e9f5..e60996099 100644
--- a/sync/src/chain.rs
+++ b/sync/src/chain.rs
@@ -459,7 +459,7 @@ impl ChainSync {
 
 	/// Updates transactions were received by a peer
 	pub fn transactions_received(&mut self, hashes: Vec<H256>, peer_id: PeerId) {
-		if let Some(mut peer_info) = self.peers.get_mut(&peer_id) {
+		if let Some(peer_info) = self.peers.get_mut(&peer_id) {
 			peer_info.last_sent_transactions.extend(&hashes);
 		}
 	}
@@ -730,7 +730,7 @@ impl ChainSync {
 		}
 
 		let result =  {
-			let mut downloader = match block_set {
+			let downloader = match block_set {
 				BlockSet::NewBlocks => &mut self.new_blocks,
 				BlockSet::OldBlocks => {
 					match self.old_blocks {
@@ -795,7 +795,7 @@ impl ChainSync {
 		else
 		{
 			let result = {
-				let mut downloader = match block_set {
+				let downloader = match block_set {
 					BlockSet::NewBlocks => &mut self.new_blocks,
 					BlockSet::OldBlocks => match self.old_blocks {
 						None => {
@@ -849,7 +849,7 @@ impl ChainSync {
 		else
 		{
 			let result = {
-				let mut downloader = match block_set {
+				let downloader = match block_set {
 					BlockSet::NewBlocks => &mut self.new_blocks,
 					BlockSet::OldBlocks => match self.old_blocks {
 						None => {
@@ -2186,7 +2186,7 @@ impl ChainSync {
 			// Select random peer to re-broadcast transactions to.
 			let peer = random::new().gen_range(0, self.peers.len());
 			trace!(target: "sync", "Re-broadcasting transactions to a random peer.");
-			self.peers.values_mut().nth(peer).map(|mut peer_info|
+			self.peers.values_mut().nth(peer).map(|peer_info|
 				peer_info.last_sent_transactions.clear()
 			);
 		}
diff --git a/sync/src/transactions_stats.rs b/sync/src/transactions_stats.rs
index 7a1257cba..aa4aa136e 100644
--- a/sync/src/transactions_stats.rs
+++ b/sync/src/transactions_stats.rs
@@ -57,8 +57,8 @@ impl TransactionsStats {
 	/// Increases number of propagations to given `enodeid`.
 	pub fn propagated(&mut self, hash: &H256, enode_id: Option<NodeId>, current_block_num: BlockNumber) {
 		let enode_id = enode_id.unwrap_or_default();
-		let mut stats = self.pending_transactions.entry(*hash).or_insert_with(|| Stats::new(current_block_num));
-		let mut count = stats.propagated_to.entry(enode_id).or_insert(0);
+		let stats = self.pending_transactions.entry(*hash).or_insert_with(|| Stats::new(current_block_num));
+		let count = stats.propagated_to.entry(enode_id).or_insert(0);
 		*count = count.saturating_add(1);
 	}