diff --git a/accounts/keystore/keystore.go b/accounts/keystore/keystore.go
index a72da97941..d0172f5cd5 100644
--- a/accounts/keystore/keystore.go
+++ b/accounts/keystore/keystore.go
@@ -24,7 +24,6 @@ import (
 	"crypto/ecdsa"
 	crand "crypto/rand"
 	"errors"
-	"fmt"
 	"math/big"
 	"os"
 	"path/filepath"
@@ -447,7 +446,7 @@ func (ks *KeyStore) Import(keyJSON []byte, passphrase, newPassphrase string) (ac
 	ks.importMu.Lock()
 	defer ks.importMu.Unlock()
 	if ks.cache.hasAddress(key.Address) {
-		return accounts.Account{}, fmt.Errorf("account already exists")
+		return accounts.Account{}, errors.New("account already exists")
 	}
 	return ks.importKey(key, newPassphrase)
 }
@@ -458,7 +457,7 @@ func (ks *KeyStore) ImportECDSA(priv *ecdsa.PrivateKey, passphrase string) (acco
 	ks.importMu.Lock()
 	defer ks.importMu.Unlock()
 	if ks.cache.hasAddress(key.Address) {
-		return accounts.Account{}, fmt.Errorf("account already exists")
+		return accounts.Account{}, errors.New("account already exists")
 	}
 	return ks.importKey(key, passphrase)
 }