diff --git a/specification/hdinsight/resource-manager/Microsoft.HDInsight/stable/2018-06-01-preview/virtualMachines.json b/specification/hdinsight/resource-manager/Microsoft.HDInsight/stable/2018-06-01-preview/virtualMachines.json
index 4db9dc3a68d9..dfb4be455bcc 100644
--- a/specification/hdinsight/resource-manager/Microsoft.HDInsight/stable/2018-06-01-preview/virtualMachines.json
+++ b/specification/hdinsight/resource-manager/Microsoft.HDInsight/stable/2018-06-01-preview/virtualMachines.json
@@ -136,6 +136,14 @@
         "name": {
           "description": "The host name",
           "type": "string"
+        },
+        "fqdn": {
+          "description": "The Fully Qualified Domain Name of host",
+          "type": "string"
+        },
+        "effectiveDiskEncryptionKeyUrl": {
+          "description": "The effective disk encryption key URL used by the host",
+          "type": "string"
         }
       },
       "readOnly": true