diff --git a/v2.00/Payment.xsd b/v2.00/Payment.xsd
index 9e6b7c5..5cc22a3 100644
--- a/v2.00/Payment.xsd
+++ b/v2.00/Payment.xsd
@@ -7,6 +7,9 @@
   <xs:include schemaLocation="Account.xsd" />
   <xs:include schemaLocation="Invoice.xsd" />
 
+  <xs:element name="Payments" nillable="true" type="ArrayOfPayment" />
+  <xs:element name="Payment" type="Payment" />
+
   <!-- Payment against an invoice -->
   <xs:complexType name="Payment">
     <xs:all>