diff --git a/schemas/2018-06-01-preview/Microsoft.HDInsight.json b/schemas/2018-06-01-preview/Microsoft.HDInsight.json
index f523da7dfa..29b99e3597 100644
--- a/schemas/2018-06-01-preview/Microsoft.HDInsight.json
+++ b/schemas/2018-06-01-preview/Microsoft.HDInsight.json
@@ -897,6 +897,18 @@
           ],
           "description": "Algorithm identifier for encryption, default RSA-OAEP."
         },
+        "encryptionAtHost": {
+          "oneOf": [
+            {
+              "type": "boolean",
+              "default": false
+            },
+            {
+              "$ref": "https://schema.management.azure.com/schemas/common/definitions.json#/definitions/expression"
+            }
+          ],
+          "description": "Indicates whether or not resource disk encryption is enabled."
+        },
         "keyName": {
           "type": "string",
           "description": "Key name that is used for enabling disk encryption."