diff --git a/specification/compute/resource-manager/Microsoft.Compute/stable/2020-12-01/compute.json b/specification/compute/resource-manager/Microsoft.Compute/stable/2020-12-01/compute.json
index fc00da24574a..df0ac974d756 100644
--- a/specification/compute/resource-manager/Microsoft.Compute/stable/2020-12-01/compute.json
+++ b/specification/compute/resource-manager/Microsoft.Compute/stable/2020-12-01/compute.json
@@ -9551,6 +9551,14 @@
         "pauseTimeBetweenBatches": {
           "type": "string",
           "description": "The wait time between completing the update for all virtual machines in one batch and starting the next batch. The time duration should be specified in ISO 8601 format. The default value is 0 seconds (PT0S)."
+        },
+        "enableCrossZoneUpgrade": {
+          "type": "boolean",
+          "description": "Allow VMSS to ignore AZ boundaries when constructing upgrade batches. Take into consideration the Update Domain and maxBatchInstancePercent to determine the batch size."
+        },
+        "prioritizeUnhealthyInstances": {
+          "type": "boolean",
+          "description": "Upgrade all unhealthy instances in a scale set before any healthy instances."
         }
       },
       "description": "The configuration parameters used while performing a rolling upgrade."