diff --git a/src/storage/file.rs b/src/storage/file.rs
index bf28103c..a45c2292 100644
--- a/src/storage/file.rs
+++ b/src/storage/file.rs
@@ -9,6 +9,7 @@ use storage::file_id::*;
 use regex::Regex;
 
 #[derive(Debug)]
+#[derive(Clone)]
 pub enum FileHeaderSpec {
     Null,
     Bool,