diff --git a/packages/taler-util/src/http-client/types.ts b/packages/taler-util/src/http-client/types.ts
index 5f899dd5a..66ac39f59 100644
--- a/packages/taler-util/src/http-client/types.ts
+++ b/packages/taler-util/src/http-client/types.ts
@@ -402,7 +402,7 @@ export const codecForBankWithdrawalOperationStatus =
 export const codecForBankWithdrawalOperationPostResponse =
   (): Codec<TalerBankIntegrationApi.BankWithdrawalOperationPostResponse> =>
     buildCodecForObject<TalerBankIntegrationApi.BankWithdrawalOperationPostResponse>()
-      .property("confirm_transfer_url", codecForURL())
+      .property("confirm_transfer_url", codecOptional(codecForURL()))
       .property("transfer_done", codecForBoolean())
       .build("TalerBankIntegrationApi.BankWithdrawalOperationPostResponse");