diff --git a/BTCPayServer/Controllers/GreenField/InvoiceController.cs b/BTCPayServer/Controllers/GreenField/InvoiceController.cs
index 74d923fdf..e94e5d327 100644
--- a/BTCPayServer/Controllers/GreenField/InvoiceController.cs
+++ b/BTCPayServer/Controllers/GreenField/InvoiceController.cs
@@ -113,7 +113,7 @@ namespace BTCPayServer.Controllers.GreenField
             {
                 ModelState.AddModelError(nameof(request.Currency), "Currency is required");
             }
-
+            request.Checkout = request.Checkout ?? new CreateInvoiceRequest.CheckoutOptions();
             if (request.Checkout.PaymentMethods?.Any() is true)
             {
                 for (int i = 0; i < request.Checkout.PaymentMethods.Length; i++)