diff --git a/api-ref/source/parameters.yaml b/api-ref/source/parameters.yaml
index 7813770a19e1..093bb88e7b8d 100644
--- a/api-ref/source/parameters.yaml
+++ b/api-ref/source/parameters.yaml
@@ -1151,6 +1151,15 @@ block_device_mapping_v2:
   in: body
   required: false
   type: object
+block_device_uuid:
+  description: |
+    This is the uuid of source resource. The uuid is point to different resource
+    based on the source_type. For example if source_type is ``image`` as the above
+    sample, the block device is created based on the specified image which is gotten
+    from the image service.
+  in: body
+  required: false
+  type: string
 block_migration:
   description: |
     Set to ``True`` to migrate local disks by using block migration. If the source
diff --git a/api-ref/source/servers.inc b/api-ref/source/servers.inc
index 6e828a42b0fa..491e11754dbc 100644
--- a/api-ref/source/servers.inc
+++ b/api-ref/source/servers.inc
@@ -302,6 +302,7 @@ Request
   - block_device_mapping_v2.delete_on_termination: delete_on_termination
   - block_device_mapping_v2.guest_format: guest_format
   - block_device_mapping_v2.boot_index: boot_index
+  - block_device_mapping_v2.uuid: block_device_uuid
   - block_device_mapping_v2.tag: device_tag
   - config_drive: config_drive
   - key_name: key_name