diff --git a/core/rawdb/chain_freezer.go b/core/rawdb/chain_freezer.go
index f2ae9fd4b0..a95ef11951 100644
--- a/core/rawdb/chain_freezer.go
+++ b/core/rawdb/chain_freezer.go
@@ -19,13 +19,13 @@ package rawdb
 import (
 	"errors"
 	"fmt"
-	"github.com/ethereum/go-ethereum/params"
 	"sync"
 	"time"
 
 	"github.com/ethereum/go-ethereum/common"
 	"github.com/ethereum/go-ethereum/ethdb"
 	"github.com/ethereum/go-ethereum/log"
+	"github.com/ethereum/go-ethereum/params"
 )
 
 const (