diff --git a/lib/cash-out/cash-out-tx.js b/lib/cash-out/cash-out-tx.js
index c9154d5f..f0437f3c 100644
--- a/lib/cash-out/cash-out-tx.js
+++ b/lib/cash-out/cash-out-tx.js
@@ -57,8 +57,8 @@ function postProcess (txVector, justAuthorized, pi) {
 
   if ((newTx.dispense && !oldTx.dispense) || (newTx.redeem && !oldTx.redeem)) {
     return pi.buildAvailableUnits(newTx.id)
-      .then(_units => {
-        const units = _.concat(_units.cassettes, _units.recyclers)
+      .then(units => {
+        units = _.concat(units.cassettes, units.recyclers)
         logger.silly('Computing bills to dispense:', {
           txId: newTx.id,
           units: units,