diff --git a/specification/eventgrid/resource-manager/Microsoft.EventGrid/preview/2020-04-01-preview/EventGrid.json b/specification/eventgrid/resource-manager/Microsoft.EventGrid/preview/2020-04-01-preview/EventGrid.json
index c90e9c427420..407f89526a45 100644
--- a/specification/eventgrid/resource-manager/Microsoft.EventGrid/preview/2020-04-01-preview/EventGrid.json
+++ b/specification/eventgrid/resource-manager/Microsoft.EventGrid/preview/2020-04-01-preview/EventGrid.json
@@ -5905,7 +5905,7 @@
             "DeletedByUser"
           ],
           "type": "string",
-	  "readOnly": true,
+          "readOnly": true,
           "x-ms-enum": {
             "name": "PartnerTopicReadinessState",
             "modelAsString": true