diff --git a/specification/compute/resource-manager/Microsoft.Compute/stable/2018-10-01/compute.json b/specification/compute/resource-manager/Microsoft.Compute/stable/2018-10-01/compute.json
index fe2024a861c5..f84b8ce377c7 100644
--- a/specification/compute/resource-manager/Microsoft.Compute/stable/2018-10-01/compute.json
+++ b/specification/compute/resource-manager/Microsoft.Compute/stable/2018-10-01/compute.json
@@ -7801,6 +7801,10 @@
           "type": "boolean",
           "description": "Specifies whether the latest model has been applied to the virtual machine."
         },
+        "protectFromScaleIn" : {
+          "type": "boolean",
+          "description": "Specifies whether the virtual machine instance shouldn't be considered for deletion during a scale-in operation"
+        },
         "vmId": {
           "readOnly": true,
           "type": "string",