diff --git a/api-ref/source/parameters.yaml b/api-ref/source/parameters.yaml
index 38a89e7324..00f99189ca 100644
--- a/api-ref/source/parameters.yaml
+++ b/api-ref/source/parameters.yaml
@@ -1558,7 +1558,7 @@ block_device_mapping_v2:
     with version 2.33. It has been restored in version 2.42.
   in: body
   required: false
-  type: object
+  type: array
 block_device_uuid:
   description: |
     This is the uuid of source resource. The uuid is point to different resource