diff --git a/specification/resources/resource-manager/Microsoft.Resources/stable/2018-05-01/resources.json b/specification/resources/resource-manager/Microsoft.Resources/stable/2018-05-01/resources.json
index 13c788d880ff..1be8d73316af 100644
--- a/specification/resources/resource-manager/Microsoft.Resources/stable/2018-05-01/resources.json
+++ b/specification/resources/resource-manager/Microsoft.Resources/stable/2018-05-01/resources.json
@@ -3201,6 +3201,7 @@
           "description": "The list of tag values."
         }
       },
+      "x-ms-azure-resource": true,
       "description": "Tag details."
     },
     "TagsListResult": {