diff --git a/xyz/openbmc_project/Inventory/Decorator/VendorInformation.interface.yaml b/xyz/openbmc_project/Inventory/Decorator/VendorInformation.interface.yaml
index 6b6a131..a31e671 100644
--- a/xyz/openbmc_project/Inventory/Decorator/VendorInformation.interface.yaml
+++ b/xyz/openbmc_project/Inventory/Decorator/VendorInformation.interface.yaml
@@ -1,5 +1,14 @@
 description: >
     Implement to provide custom properties added to an item by the
     item vendor.
+properties:
+    - name: CustomField1
+      type: string
+      description: >
+          The custom field 1 of the item.
+    - name: CustomField2
+      type: string
+      description: >
+          The custom field 2 of the item.
 
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