diff --git a/src/chunk.rs b/src/chunk.rs
index 2deb482..e1f22b6 100644
--- a/src/chunk.rs
+++ b/src/chunk.rs
@@ -10,6 +10,7 @@ use super::*;
 /// able to write two things at the same time (which isn't possible with a
 /// single chunk because of the streaming nature --- only one writer can borrow
 /// it at a time).
+#[derive(Clone)]
 pub struct Chunk {
     pub(crate) buf: Vec<u8>,
     pub(crate) offsets: Vec<(Ref, usize)>,
diff --git a/src/color.rs b/src/color.rs
index 3c354ad..3b650d7 100644
--- a/src/color.rs
+++ b/src/color.rs
@@ -1304,6 +1304,7 @@ impl OutputIntent<'_> {
 }
 
 /// The output intent subtype.
+#[derive(Debug, Copy, Clone, Eq, PartialEq, Hash)]
 pub enum OutputIntentSubtype<'a> {
     /// `GTS_PDFX`
     PDFX,