diff --git a/pallas-primitives/src/alonzo/model.rs b/pallas-primitives/src/alonzo/model.rs
index 7553fdf..33918c7 100644
--- a/pallas-primitives/src/alonzo/model.rs
+++ b/pallas-primitives/src/alonzo/model.rs
@@ -77,7 +77,7 @@ pub struct Header {
     pub body_signature: Bytes,
 }
 
-#[derive(Serialize, Deserialize, Encode, Decode, Debug, PartialEq, Eq, Clone)]
+#[derive(Serialize, Deserialize, Encode, Decode, Debug, PartialEq, Eq, PartialOrd, Ord, Clone)]
 pub struct TransactionInput {
     #[n(0)]
     pub transaction_id: Hash<32>,