diff --git a/ethcore/src/client/client.rs b/ethcore/src/client/client.rs
index 47974356f1f..21139f00c50 100644
--- a/ethcore/src/client/client.rs
+++ b/ethcore/src/client/client.rs
@@ -34,7 +34,6 @@ use ethereum_types::{H256, Address, U256};
 use block::{IsBlock, LockedBlock, Drain, ClosedBlock, OpenBlock, enact_verified, SealedBlock};
 use blockchain::{BlockChain, BlockChainDB, BlockProvider, TreeRoute, ImportRoute, TransactionAddress, ExtrasInsert};
 use client::ancient_import::AncientVerifier;
-use client::Error as ClientError;
 use client::{
 	Nonce, Balance, ChainInfo, BlockInfo, CallContract, TransactionInfo,
 	RegistryInfo, ReopenBlock, PrepareOpenBlock, ScheduleInfo, ImportSealedBlock,
@@ -933,7 +932,7 @@ impl Client {
 	}
 
 	// prune ancient states until below the memory limit or only the minimum amount remain.
-	fn prune_ancient(&self, mut state_db: StateDB, chain: &BlockChain) -> Result<(), ClientError> {
+	fn prune_ancient(&self, mut state_db: StateDB, chain: &BlockChain) -> Result<(), ::error::Error> {
 		let number = match state_db.journal_db().latest_era() {
 			Some(n) => n,
 			None => return Ok(()),
diff --git a/ethcore/src/client/error.rs b/ethcore/src/client/error.rs
deleted file mode 100644
index 6851a4057b0..00000000000
--- a/ethcore/src/client/error.rs
+++ /dev/null
@@ -1,55 +0,0 @@
-// Copyright 2015-2018 Parity Technologies (UK) Ltd.
-// This file is part of Parity.
-
-// Parity is free software: you can redistribute it and/or modify
-// it under the terms of the GNU General Public License as published by
-// the Free Software Foundation, either version 3 of the License, or
-// (at your option) any later version.
-
-// Parity is distributed in the hope that it will be useful,
-// but WITHOUT ANY WARRANTY; without even the implied warranty of
-// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-// GNU General Public License for more details.
-
-// You should have received a copy of the GNU General Public License
-// along with Parity.  If not, see <http://www.gnu.org/licenses/>.
-
-use std::fmt::{Display, Formatter, Error as FmtError};
-use std::io;
-use ethtrie::TrieError;
-
-/// Client configuration errors.
-#[derive(Debug)]
-pub enum Error {
-	/// TrieDB-related error.
-	Trie(TrieError),
-	/// Io error.
-	Io(io::Error),
-}
-
-impl From<TrieError> for Error {
-	fn from(err: TrieError) -> Self {
-		Error::Trie(err)
-	}
-}
-
-impl From<io::Error> for Error {
-	fn from(err: io::Error) -> Self {
-		Error::Io(err)
-	}
-}
-
-impl<E> From<Box<E>> for Error where Error: From<E> {
-	fn from(err: Box<E>) -> Self {
-		Error::from(*err)
-	}
-}
-
-impl Display for Error {
-	fn fmt(&self, f: &mut Formatter) -> Result<(), FmtError> {
-		match *self {
-			Error::Trie(ref err) => write!(f, "{}", err),
-			Error::Io(ref err) => write!(f, "{}", err),
-		}
-	}
-}
diff --git a/ethcore/src/client/mod.rs b/ethcore/src/client/mod.rs
index 8c5abf3f5d9..ffd303c1277 100644
--- a/ethcore/src/client/mod.rs
+++ b/ethcore/src/client/mod.rs
@@ -19,7 +19,6 @@
 mod ancient_import;
 mod client;
 mod config;
-mod error;
 #[cfg(any(test, feature = "test-helpers"))]
 mod evm_test_client;
 mod io_message;
@@ -29,7 +28,6 @@ mod trace;
 
 pub use self::client::*;
 pub use self::config::{Mode, ClientConfig, DatabaseCompactionProfile, BlockChainConfig, VMType};
-pub use self::error::Error;
 #[cfg(any(test, feature = "test-helpers"))]
 pub use self::evm_test_client::{EvmTestClient, EvmTestError, TransactResult};
 pub use self::io_message::ClientIoMessage;
diff --git a/ethcore/src/error.rs b/ethcore/src/error.rs
index 88b50f8134f..75b2b517503 100644
--- a/ethcore/src/error.rs
+++ b/ethcore/src/error.rs
@@ -24,7 +24,6 @@ use unexpected::{Mismatch, OutOfBounds};
 use ethtrie::TrieError;
 use io::*;
 use header::BlockNumber;
-use client::Error as ClientError;
 use snapshot::Error as SnapshotError;
 use engines::EngineError;
 use ethkey::Error as EthkeyError;
@@ -250,12 +249,6 @@ error_chain! {
 	}
 
 	errors {
-		#[doc = "Client configuration error."]
-		Client(err: ClientError) {
-			description("Client configuration error.")
-			display("Client configuration error {}", err)
-		}
-
 		#[doc = "Snapshot error."]
 		Snapshot(err: SnapshotError) {
 			description("Snapshot error.")
@@ -297,15 +290,6 @@ error_chain! {
 /// Result of import block operation.
 pub type ImportResult = EthcoreResult<H256>;
 
-impl From<ClientError> for Error {
-	fn from(err: ClientError) -> Error {
-		match err {
-			ClientError::Trie(err) => ErrorKind::Trie(err).into(),
-			_ => ErrorKind::Client(err).into()
-		}
-	}
-}
-
 impl From<AccountsError> for Error {
 	fn from(err: AccountsError) -> Error {
 		ErrorKind::AccountProvider(err).into()