diff --git a/schemas/openbmc-dbus.json b/schemas/openbmc-dbus.json
index aa586a7..0b87b61 100644
--- a/schemas/openbmc-dbus.json
+++ b/schemas/openbmc-dbus.json
@@ -9,6 +9,9 @@
                         "Asset": {
                             "additionalProperties": false,
                             "properties": {
+                                "SparePartNumber": {
+                                    "type": "string"
+                                },
                                 "Manufacturer": {
                                     "type": "string"
                                 },