diff --git a/impls/monero.dart/lib/src/ledger.dart b/impls/monero.dart/lib/src/ledger.dart
index b24bced5..68cf2c1c 100644
--- a/impls/monero.dart/lib/src/ledger.dart
+++ b/impls/monero.dart/lib/src/ledger.dart
@@ -23,7 +23,10 @@ void enableLedgerExchange(
       final response = await exchange(ledger, device, ledgerRequest);
 
       final Pointer<Uint8> result = malloc<Uint8>(response.length);
-      result.asTypedList(response.length).addAll(response);
+      for (var i = 0; i < response.length; i++) {
+        result.asTypedList(response.length)[i] = response[i];
+      }
+
       monero.Wallet_setDeviceReceivedData(
           ptr, result.cast<UnsignedChar>(), response.length);
 
diff --git a/patches/monero/0015-add-dummy-device-for-ledger.patch b/patches/monero/0015-add-dummy-device-for-ledger.patch
index 4f88774b..3ab7b52b 100644
--- a/patches/monero/0015-add-dummy-device-for-ledger.patch
+++ b/patches/monero/0015-add-dummy-device-for-ledger.patch
@@ -427,10 +427,10 @@ index 8bdd75a5a..d8661b213 100644
  
  using namespace std;
  using namespace cryptonote;
-@@ -3299,4 +3302,94 @@ uint64_t WalletImpl::getBytesSent()
+@@ -3299,4 +3302,95 @@ uint64_t WalletImpl::getBytesSent()
      return m_wallet->get_bytes_sent();
  }
- 
+
 +
 +// HIDAPI_DUMMY
 +bool WalletImpl::getStateIsConnected() {
@@ -502,6 +502,7 @@ index 8bdd75a5a..d8661b213 100644
 +    return;
 +    #else
 +    hw::io::device_io_dummy::receivedFromDevice = static_cast<unsigned char *>(malloc(len));
++    hw::io::device_io_dummy::receivedFromDeviceLength = len;
 +    memset(hw::io::device_io_dummy::receivedFromDevice, 0, len);
 +    memcpy(hw::io::device_io_dummy::receivedFromDevice, data, len);
 +    hw::io::device_io_dummy::waitsForDeviceReceive = false;