diff --git a/src/lib.rs b/src/lib.rs
index 2be5960..6fbbe85 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -370,7 +370,7 @@ pub trait PrimeField: Field + From<u64> {
 }
 
 /// Byte order used when encoding/decoding field elements as bytestrings.
-#[derive(Debug)]
+#[derive(Clone, Copy, Debug, Eq, PartialEq)]
 pub enum ByteOrder {
     /// Big endian.
     BigEndian,