diff --git a/CHANGELOG.unreleased.md b/CHANGELOG.unreleased.md
index fc01fea323e..6ea9b4d14a6 100644
--- a/CHANGELOG.unreleased.md
+++ b/CHANGELOG.unreleased.md
@@ -8,7 +8,7 @@
 > Users must be able to say: “Nice enhancement, I'm eager to test it”
 
 - [Backup/Encryption] Use `aes-256-gcm` instead of `aes-256-ccm` to mitigate [padding oracle attacks](https://en.wikipedia.org/wiki/Padding_oracle_attack) (PR [#6447](https://github.com/vatesfr/xen-orchestra/pull/6447))
-- [Backup] Use `NBD` to transfer data (PR [#6461](https://github.com/vatesfr/xen-orchestra/pull/6461))
+- [Delta Backup] Use [NBD](https://en.wikipedia.org/wiki/Network_block_device) to download disks (PR [#6461](https://github.com/vatesfr/xen-orchestra/pull/6461))
 
 ### Bug fixes