diff --git a/crates/chain/src/keychain/txout_index.rs b/crates/chain/src/keychain/txout_index.rs
index 0bdd6c94..cf0f21f8 100644
--- a/crates/chain/src/keychain/txout_index.rs
+++ b/crates/chain/src/keychain/txout_index.rs
@@ -154,8 +154,9 @@ impl<K: Clone + Ord + Debug> Indexer for KeychainTxOutIndex<K> {
 
     fn index_tx(&mut self, tx: &bitcoin::Transaction) -> Self::ChangeSet {
         let mut changeset = ChangeSet::<K>::default();
+        let txid = tx.compute_txid();
         for (op, txout) in tx.output.iter().enumerate() {
-            changeset.append(self.index_txout(OutPoint::new(tx.compute_txid(), op as u32), txout));
+            changeset.append(self.index_txout(OutPoint::new(txid, op as u32), txout));
         }
         changeset
     }