diff --git a/pallas-utxorpc/src/lib.rs b/pallas-utxorpc/src/lib.rs
index b3633957..a63b1883 100644
--- a/pallas-utxorpc/src/lib.rs
+++ b/pallas-utxorpc/src/lib.rs
@@ -53,6 +53,7 @@ fn i64_to_bigint(value: i64) -> Option<u5c::BigInt> {
 pub trait LedgerContext: Clone {
     fn get_utxos(&self, refs: &[TxoRef]) -> Option<UtxoMap>;
     fn get_slot_timestamp(&self, slot: u64) -> Option<u64>;
+    fn get_historical_utxos(&self, refs: &[TxoRef]) -> Option<UtxoMap>;
 }
 
 #[derive(Default, Clone)]
@@ -636,9 +637,24 @@ impl<C: LedgerContext> Mapper<C> {
     }
 
     pub fn map_tx(&self, tx: &trv::MultiEraTx) -> u5c::Tx {
-        let resolved = self.ledger.as_ref().and_then(|ctx| {
+        let resolved = self.ledger.as_ref().map(|ctx| {
             let to_resolve = self.find_related_inputs(tx);
-            ctx.get_utxos(to_resolve.as_slice())
+
+            let mut utxos = ctx.get_utxos(to_resolve.as_slice()).unwrap_or_default();
+
+            let missing_refs: Vec<_> = to_resolve
+                .iter()
+                .filter(|r| !utxos.contains_key(r))
+                .copied()
+                .collect();
+
+            if !missing_refs.is_empty() {
+                if let Some(historical) = ctx.get_historical_utxos(&missing_refs) {
+                    utxos.extend(historical);
+                }
+            }
+
+            utxos
         });
 
         u5c::Tx {
@@ -778,6 +794,10 @@ mod tests {
         fn get_slot_timestamp(&self, _slot: u64) -> Option<u64> {
             None
         }
+
+        fn get_historical_utxos(&self, _: &[TxoRef]) -> Option<UtxoMap> {
+            None
+        }
     }
 
     #[test]