diff --git a/specification/hdinsight/resource-manager/Microsoft.HDInsight/stable/2018-06-01-preview/cluster.json b/specification/hdinsight/resource-manager/Microsoft.HDInsight/stable/2018-06-01-preview/cluster.json
index f0ca0b010cf4..978002b9d6b0 100644
--- a/specification/hdinsight/resource-manager/Microsoft.HDInsight/stable/2018-06-01-preview/cluster.json
+++ b/specification/hdinsight/resource-manager/Microsoft.HDInsight/stable/2018-06-01-preview/cluster.json
@@ -1518,11 +1518,6 @@
         "msiResourceId": {
           "type": "string",
           "description": "Resource ID of Managed Identity that is used to access the key vault."
-        },
-        "encryptionAtHost": {
-          "type": "boolean",
-          "default": false,
-          "description": "Indicates whether or not resource disk encryption is enabled."
         }
       }
     },