diff --git a/drive/drive.go b/drive/drive.go
index 812067bd0..f8a7e1689 100644
--- a/drive/drive.go
+++ b/drive/drive.go
@@ -1431,6 +1431,7 @@ func (o *Object) MimeType() string {
 var (
 	_ fs.Fs                = (*Fs)(nil)
 	_ fs.Purger            = (*Fs)(nil)
+	_ fs.CleanUpper        = (*Fs)(nil)
 	_ fs.PutStreamer       = (*Fs)(nil)
 	_ fs.Copier            = (*Fs)(nil)
 	_ fs.Mover             = (*Fs)(nil)
diff --git a/yandex/yandex.go b/yandex/yandex.go
index f6a40f949..3913c8486 100644
--- a/yandex/yandex.go
+++ b/yandex/yandex.go
@@ -660,6 +660,7 @@ func (o *Object) MimeType() string {
 var (
 	_ fs.Fs          = (*Fs)(nil)
 	_ fs.Purger      = (*Fs)(nil)
+	_ fs.CleanUpper  = (*Fs)(nil)
 	_ fs.PutStreamer = (*Fs)(nil)
 	_ fs.ListRer     = (*Fs)(nil)
 	//_ fs.Copier = (*Fs)(nil)