diff --git a/packages/nodes-base/nodes/Xero/InvoiceInterface.ts b/packages/nodes-base/nodes/Xero/InvoiceInterface.ts
index 1c86f8b560..270ff9ec3f 100644
--- a/packages/nodes-base/nodes/Xero/InvoiceInterface.ts
+++ b/packages/nodes-base/nodes/Xero/InvoiceInterface.ts
@@ -20,7 +20,7 @@ export interface IInvoice extends ITenantId {
 	Contact?: IDataObject;
 	Date?: string;
 	DueDate?: string;
-	LineAmountType?: string;
+	LineAmountTypes?: string;
 	InvoiceNumber?: string;
 	Reference?: string;
 	BrandingThemeID?: string;
diff --git a/packages/nodes-base/nodes/Xero/Xero.node.ts b/packages/nodes-base/nodes/Xero/Xero.node.ts
index a971b7caf6..27efa06902 100644
--- a/packages/nodes-base/nodes/Xero/Xero.node.ts
+++ b/packages/nodes-base/nodes/Xero/Xero.node.ts
@@ -291,7 +291,7 @@ export class Xero implements INodeType {
 							body.InvoiceNumber = additionalFields.invoiceNumber as string;
 						}
 						if (additionalFields.lineAmountType) {
-							body.LineAmountType = additionalFields.lineAmountType as string;
+							body.LineAmountTypes = additionalFields.lineAmountType as string;
 						}
 						if (additionalFields.plannedPaymentDate) {
 							body.PlannedPaymentDate = additionalFields.plannedPaymentDate as string;
@@ -388,7 +388,7 @@ export class Xero implements INodeType {
 							body.InvoiceNumber = updateFields.invoiceNumber as string;
 						}
 						if (updateFields.lineAmountType) {
-							body.LineAmountType = updateFields.lineAmountType as string;
+							body.LineAmountTypes = updateFields.lineAmountType as string;
 						}
 						if (updateFields.plannedPaymentDate) {
 							body.PlannedPaymentDate = updateFields.plannedPaymentDate as string;