diff --git a/src/metadata/cuex.rs b/src/metadata/cuex.rs
index accc8c4..dcf5f10 100644
--- a/src/metadata/cuex.rs
+++ b/src/metadata/cuex.rs
@@ -63,7 +63,7 @@ impl fmt::Display for NrgCuex {
 }
 
 
-#[derive(Debug)]
+#[derive(Copy, Clone, Debug)]
 pub struct NrgCuexTrack {
     pub mode: u8,
     pub track_number: u8,
diff --git a/src/metadata/mtyp.rs b/src/metadata/mtyp.rs
index 9464577..3918021 100644
--- a/src/metadata/mtyp.rs
+++ b/src/metadata/mtyp.rs
@@ -29,7 +29,7 @@ use ::error::NrgError;
 use super::readers::read_u32;
 
 
-#[derive(Debug)]
+#[derive(Copy, Clone, Debug)]
 pub struct NrgMtyp {
     pub size: u32,
     pub unknown: u32,
diff --git a/src/metadata/sinf.rs b/src/metadata/sinf.rs
index 84580f2..5cdb0bf 100644
--- a/src/metadata/sinf.rs
+++ b/src/metadata/sinf.rs
@@ -29,7 +29,7 @@ use ::error::NrgError;
 use super::readers::read_u32;
 
 
-#[derive(Debug)]
+#[derive(Copy, Clone, Debug)]
 pub struct NrgSinf {
     pub size: u32,
     pub nb_tracks: u32,