diff --git a/specification/billing/resource-manager/Microsoft.Billing/preview/2019-10-01-preview/billing.json b/specification/billing/resource-manager/Microsoft.Billing/preview/2019-10-01-preview/billing.json
index 6fe672df65ab..9c99b80b362f 100644
--- a/specification/billing/resource-manager/Microsoft.Billing/preview/2019-10-01-preview/billing.json
+++ b/specification/billing/resource-manager/Microsoft.Billing/preview/2019-10-01-preview/billing.json
@@ -5769,6 +5769,11 @@
     },
     "TransferDetails": {
       "type": "object",
+      "allOf": [
+        {
+          "$ref": "#/definitions/Resource"
+        }
+      ],
       "description": "Details of the transfer.",
       "properties": {
         "properties": {
@@ -5780,6 +5785,11 @@
     },
     "RecipientTransferDetails": {
       "type": "object",
+      "allOf": [
+        {
+          "$ref": "#/definitions/Resource"
+        }
+      ],
       "description": "Details of the transfer.",
       "properties": {
         "properties": {