diff --git a/app/Helpers/Bank/Nordigen/Transformer/TransactionTransformer.php b/app/Helpers/Bank/Nordigen/Transformer/TransactionTransformer.php
index 63c58c5a2b77..ebef634daa45 100644
--- a/app/Helpers/Bank/Nordigen/Transformer/TransactionTransformer.php
+++ b/app/Helpers/Bank/Nordigen/Transformer/TransactionTransformer.php
@@ -110,7 +110,7 @@ class TransactionTransformer implements BankRevenueInterface
         }
 
         // enrich description with currencyExchange informations
-        if (array_key_exists('currencyExchange', $transaction)) {
+        if (isset($transaction['currencyExchange'])) {
             foreach ($transaction["currencyExchange"] as $exchangeRate) {
                 $targetAmount = round($amount * (float) ($exchangeRate["exchangeRate"] ?? 1) , 2);
                 $description .= '\nexchangeRate: ' . $amount . " " . ($exchangeRate["sourceCurrency"] ?? '?') . " = " . $targetAmount . " " . ($exchangeRate["targetCurrency"] ?? '?') . " (" . ($exchangeRate["quotationDate"] ?? '?') . ")";