diff --git a/weed/server/filer_server_handlers_write_autochunk.go b/weed/server/filer_server_handlers_write_autochunk.go
index 831451685..f1834c893 100644
--- a/weed/server/filer_server_handlers_write_autochunk.go
+++ b/weed/server/filer_server_handlers_write_autochunk.go
@@ -3,6 +3,7 @@ package weed_server
 import (
 	"bytes"
 	"context"
+	"errors"
 	"fmt"
 	//"github.com/seaweedfs/seaweedfs/weed/s3api"
 	"github.com/seaweedfs/seaweedfs/weed/s3api/s3_constants"