diff --git a/index.html b/index.html
index 28eadfa6..4334b2e8 100644
--- a/index.html
+++ b/index.html
@@ -1819,8 +1819,8 @@ <h2>
           dictionary PaymentDetailsUpdate : PaymentDetailsBase {
             DOMString error;
             PaymentItem total;
-            AddressErrors shippingAddressErrors;
-            PayerErrorFields payerErrors;
+            AddressErrors shippingAddressErrors = null;
+            PayerErrorFields payerErrors = null;
             object paymentMethodErrors;
           };
         </pre>
@@ -3353,8 +3353,8 @@ <h3>
           </h3>
           <pre class="idl">
             dictionary PaymentValidationErrors {
-              PayerErrorFields payer;
-              AddressErrors shippingAddress;
+              PayerErrorFields payer = null;
+              AddressErrors shippingAddress = null;
               DOMString error;
               object paymentMethod;
             };