diff --git a/specification/storage/data-plane/Microsoft.BlobStorage/preview/2019-12-12/blob.json b/specification/storage/data-plane/Microsoft.BlobStorage/preview/2019-12-12/blob.json
index 205911a72786..839bba3b7e75 100644
--- a/specification/storage/data-plane/Microsoft.BlobStorage/preview/2019-12-12/blob.json
+++ b/specification/storage/data-plane/Microsoft.BlobStorage/preview/2019-12-12/blob.json
@@ -10249,7 +10249,8 @@
       "type": "object",
       "required": [
         "Name",
-        "ContainerName"
+        "ContainerName",
+        "TagValue"
       ],
       "properties": {
         "Name": {
@@ -10257,6 +10258,9 @@
         },
         "ContainerName": {
           "type": "string"
+        },
+        "TagValue": {
+          "type": "string"
         }
       }
     },