diff --git a/app/frontend/wallet/shelley/shelley-transaction-planner.ts b/app/frontend/wallet/shelley/shelley-transaction-planner.ts
index a595034f46..ad8b2f879b 100644
--- a/app/frontend/wallet/shelley/shelley-transaction-planner.ts
+++ b/app/frontend/wallet/shelley/shelley-transaction-planner.ts
@@ -39,12 +39,15 @@ type Cert = {
poolHash: string | null
}
+type Withdrawals = [string, Lovelace]
+
// Estimates size of final transaction in bytes.
// Note(ppershing): can overshoot a bit
export function estimateTxSize(
inputs: Array,
outputs: Array