diff --git a/lib/cash-in/cash-in-atomic.js b/lib/cash-in/cash-in-atomic.js
index 8a23360c..e3441a76 100644
--- a/lib/cash-in/cash-in-atomic.js
+++ b/lib/cash-in/cash-in-atomic.js
@@ -18,7 +18,7 @@ function atomic (machineTx, pi) {
 
     return t.oneOrNone(sql, [machineTx.id])
       .then(row => {
-        if (row && row.tx_version >= machineTx.txVersion) throw new E.StaleTxError('Stale tx')
+        if (row && row.tx_version >= machineTx.txVersion) throw new E.StaleTxError({ txId: machineTx.id })
 
         return t.any(sql2, [machineTx.id])
           .then(billRows => {
diff --git a/lib/cash-out/cash-out-atomic.js b/lib/cash-out/cash-out-atomic.js
index e51710d5..c82f6f65 100644
--- a/lib/cash-out/cash-out-atomic.js
+++ b/lib/cash-out/cash-out-atomic.js
@@ -25,7 +25,7 @@ function atomic (tx, pi, fromClient) {
       .then(toObj)
       .then(oldTx => {
         const isStale = fromClient && oldTx && (oldTx.txVersion >= tx.txVersion)
-        if (isStale) throw new E.StaleTxError('Stale tx')
+        if (isStale) throw new E.StaleTxError({ txId: tx.id })
 
         return preProcess(t, oldTx, tx, pi)
           .then(preProcessedTx => cashOutLow.upsert(t, oldTx, preProcessedTx))