diff --git a/schemas/legacy.json b/schemas/legacy.json
index ff47338..4390690 100644
--- a/schemas/legacy.json
+++ b/schemas/legacy.json
@@ -156,6 +156,9 @@
                 "Thresholds": {
                     "$ref": "#/definitions/Types/Thresholds"
                 },
+                "HostSMbusIndex": {
+                    "$ref": "#/definitions/Types/HostSMbusIndex"
+                },
                 "Type": {
                     "$ref": "#/definitions/Types/Type"
                 }
@@ -399,6 +402,9 @@
                 },
                 "type": "array"
             },
+            "HostSMbusIndex": {
+                "type": "number"
+            },
             "Type": {
                 "type": "string"
             }