diff --git a/internal/dump/zip.go b/internal/dump/zip.go
index 6041c5187..17aeb4829 100644
--- a/internal/dump/zip.go
+++ b/internal/dump/zip.go
@@ -39,7 +39,9 @@ func (d *Dumper) dumpNodeZip(ctx context.Context, node *restic.Node, zw *zip.Wri
 		Modified:           node.ModTime,
 	}
 	header.SetMode(node.Mode)
-	header.Method = zip.Deflate
+	if node.Type == restic.NodeTypeFile {
+		header.Method = zip.Deflate
+	}
 
 	if node.Type == restic.NodeTypeDir {
 		header.Name += "/"