diff --git a/consensus/ethash/consensus.go b/consensus/ethash/consensus.go
index 51fc33a094..d5ee9fb060 100644
--- a/consensus/ethash/consensus.go
+++ b/consensus/ethash/consensus.go
@@ -20,8 +20,8 @@ import (
 	"bytes"
 	"errors"
 	"fmt"
-	"math/big"
 	"math"
+	"math/big"
 	"runtime"
 	"time"