diff --git a/specification/azurearcdata/resource-manager/Microsoft.AzureArcData/preview/2022-03-01-preview/dataControllers.json b/specification/azurearcdata/resource-manager/Microsoft.AzureArcData/preview/2022-03-01-preview/dataControllers.json
index 59f2ef201866..1cbdc69564fc 100644
--- a/specification/azurearcdata/resource-manager/Microsoft.AzureArcData/preview/2022-03-01-preview/dataControllers.json
+++ b/specification/azurearcdata/resource-manager/Microsoft.AzureArcData/preview/2022-03-01-preview/dataControllers.json
@@ -56,6 +56,11 @@
             "type": "string"
           },
           "description": "Resource tags"
+        },
+        "properties": {
+          "$ref": "#/definitions/DataControllerProperties",
+          "description": "The data controller's properties",
+          "x-ms-client-flatten": false
         }
       },
       "description": "Used for updating a data controller resource."