diff --git a/yarn-project/circuit-types/src/tx/tx_hash.ts b/yarn-project/circuit-types/src/tx/tx_hash.ts
index 98a3c6ed8d2..bba7395a741 100644
--- a/yarn-project/circuit-types/src/tx/tx_hash.ts
+++ b/yarn-project/circuit-types/src/tx/tx_hash.ts
@@ -2,6 +2,8 @@ import { Fr } from '@aztec/circuits.js';
 import { schemas } from '@aztec/foundation/schemas';
 import { BufferReader } from '@aztec/foundation/serialize';
 
+import { z } from 'zod';
+
 /**
  * A class representing hash of Aztec transaction.
  */
@@ -49,7 +51,11 @@ export class TxHash {
   }
 
   static get schema() {
-    return schemas.Fr.transform(value => new TxHash(value));
+    return z
+      .object({
+        hash: schemas.Fr,
+      })
+      .transform(({ hash }) => new TxHash(hash));
   }
 
   static zero() {