diff --git a/extern/sector-storage/ffiwrapper/sealer_cgo.go b/extern/sector-storage/ffiwrapper/sealer_cgo.go
index 657fac08c..dca8b44b5 100644
--- a/extern/sector-storage/ffiwrapper/sealer_cgo.go
+++ b/extern/sector-storage/ffiwrapper/sealer_cgo.go
@@ -142,7 +142,10 @@ func (sb *Sealer) AddPiece(ctx context.Context, sector storage.SectorRef, existi
 			break
 		}
 
-		done := make(chan struct{cid.Cid; error}, 1)
+		done := make(chan struct {
+			cid.Cid
+			error
+		}, 1)
 		pbuf := <-throttle
 		copy(pbuf, buf[:read])
 
@@ -152,7 +155,10 @@ func (sb *Sealer) AddPiece(ctx context.Context, sector storage.SectorRef, existi
 			}()
 
 			c, err := sb.pieceCid(sector.ProofType, pbuf[:read])
-			done <- struct {cid.Cid; error }{c, err}
+			done <- struct {
+				cid.Cid
+				error
+			}{c, err}
 		}(read)
 
 		piecePromises = append(piecePromises, func() (abi.PieceInfo, error) {
diff --git a/extern/sector-storage/ffiwrapper/sealer_test.go b/extern/sector-storage/ffiwrapper/sealer_test.go
index 9e4aa0042..3b379af6f 100644
--- a/extern/sector-storage/ffiwrapper/sealer_test.go
+++ b/extern/sector-storage/ffiwrapper/sealer_test.go
@@ -4,7 +4,6 @@ import (
 	"bytes"
 	"context"
 	"fmt"
-	"github.com/filecoin-project/lotus/extern/storage-sealing/lib/nullreader"
 	"io"
 	"io/ioutil"
 	"math/rand"
@@ -34,6 +33,7 @@ import (
 
 	"github.com/filecoin-project/lotus/extern/sector-storage/ffiwrapper/basicfs"
 	"github.com/filecoin-project/lotus/extern/sector-storage/storiface"
+	"github.com/filecoin-project/lotus/extern/storage-sealing/lib/nullreader"
 )
 
 func init() {
@@ -654,7 +654,7 @@ func TestAddPiece512M(t *testing.T) {
 	r := rand.New(rand.NewSource(0x7e5))
 
 	c, err := sb.AddPiece(context.TODO(), storage.SectorRef{
-		ID:        abi.SectorID{
+		ID: abi.SectorID{
 			Miner:  miner,
 			Number: 0,
 		},
@@ -697,7 +697,7 @@ func BenchmarkAddPiece512M(b *testing.B) {
 
 	for i := 0; i < b.N; i++ {
 		c, err := sb.AddPiece(context.TODO(), storage.SectorRef{
-			ID:        abi.SectorID{
+			ID: abi.SectorID{
 				Miner:  miner,
 				Number: abi.SectorNumber(i),
 			},
@@ -708,4 +708,4 @@ func BenchmarkAddPiece512M(b *testing.B) {
 		}
 		fmt.Println(c)
 	}
-}
\ No newline at end of file
+}