diff --git a/pkg/fs/metadata.go b/pkg/fs/metadata.go
index bc2befa..bdc2ae0 100644
--- a/pkg/fs/metadata.go
+++ b/pkg/fs/metadata.go
@@ -377,7 +377,10 @@ func (md *Metadata) Close() (err error) {
 
 func (md *Metadata) close() (err error) {
 	md.cancel()
-	md.wc = nil
+	if md.wc != nil {
+		close(md.wc)
+		md.wc = nil
+	}
 	if md.f != nil {
 		md.f.Sync()
 		err = md.f.Close()