diff --git a/packages/neuron-wallet/src/controllers/transactions.ts b/packages/neuron-wallet/src/controllers/transactions.ts
index c48786676d..08ab022e1a 100644
--- a/packages/neuron-wallet/src/controllers/transactions.ts
+++ b/packages/neuron-wallet/src/controllers/transactions.ts
@@ -106,7 +106,7 @@ export default class TransactionsController {
         }
         return false
       })
-      .map(i => BigInt(i.capacity))
+      .map(i => BigInt(i.capacity || 0))
       .reduce((result, c) => result + c, BigInt(0))
     const value: bigint = outputCapacities - inputCapacities
     transaction.value = value.toString()