diff --git a/schemas/virtual_sensor.json b/schemas/virtual_sensor.json
index 3584489..77c39c9 100644
--- a/schemas/virtual_sensor.json
+++ b/schemas/virtual_sensor.json
@@ -52,7 +52,7 @@
                         "The type of calculation this sensor uses."
                     ],
                     "type": "string",
-                    "enum": ["ModifiedMedian"]
+                    "enum": ["ModifiedMedian", "Maximum"]
                 },
                 "Units": {
                     "description": [