diff --git a/@xen-orchestra/backups/RemoteAdapter.mjs b/@xen-orchestra/backups/RemoteAdapter.mjs
index 3165c6cfa50..1a7d47bb198 100644
--- a/@xen-orchestra/backups/RemoteAdapter.mjs
+++ b/@xen-orchestra/backups/RemoteAdapter.mjs
@@ -700,7 +700,11 @@ export class RemoteAdapter {
     }
   }
 
-  async outputStream(path, input, { checksum = true, maxStreamLength, streamLength, validator = noop } = {}) {
+  async outputStream(
+    path,
+    input,
+    { checksum = !this._handler.isEncrypted, maxStreamLength, streamLength, validator = noop } = {}
+  ) {
     const container = watchStreamSize(input)
     await this._handler.outputStream(path, input, {
       checksum,
diff --git a/@xen-orchestra/backups/docs/VM backups/README.md b/@xen-orchestra/backups/docs/VM backups/README.md
index bd81f8b13ee..4ac1445309f 100644
--- a/@xen-orchestra/backups/docs/VM backups/README.md	
+++ b/@xen-orchestra/backups/docs/VM backups/README.md	
@@ -29,7 +29,7 @@
      │        └─ <YYYYMMDD>T<HHmmss>.vhd
      ├─ <YYYYMMDD>T<HHmmss>.json // backup metadata
      ├─ <YYYYMMDD>T<HHmmss>.xva
-     └─ <YYYYMMDD>T<HHmmss>.xva.checksum
+     └─ <YYYYMMDD>T<HHmmss>.xva.checksum // only on backup before 01/02/2025 or non encrypted
 ```
 
 ### with vhd directories
diff --git a/CHANGELOG.unreleased.md b/CHANGELOG.unreleased.md
index 1cf7b09f86d..f596c910450 100644
--- a/CHANGELOG.unreleased.md
+++ b/CHANGELOG.unreleased.md
@@ -18,7 +18,8 @@
   - [UI]: Use user language set in XO 5 to set the language in XO 6 (PR [#8232](https://github.com/vatesfr/xen-orchestra/pull/8232))
   - [Console]: Adding a border when console is focused (PR [#8235](https://github.com/vatesfr/xen-orchestra/pull/8235))
   - [Console]: Add fullscreen functionality for console (PR [#8238](https://github.com/vatesfr/xen-orchestra/pull/8238))
-- [Backup] New [ChaCha20-Poly1305](https://en.wikipedia.org/wiki/ChaCha20-Poly1305) encryption for remotes, allow encrypted files larger than 64GB (PR [#8237](https://github.com/vatesfr/xen-orchestra/pull/8237))
+  - [Backup] New [ChaCha20-Poly1305](https://en.wikipedia.org/wiki/ChaCha20-Poly1305) encryption for remotes, allow encrypted files larger than 64GB (PR [#8237](https://github.com/vatesfr/xen-orchestra/pull/8237))
+  - [Backup] Don't checksum encrypted full backup because encryption already handles it (PR [#8270](https://github.com/vatesfr/xen-orchestra/pull/8270))
 
 ### Bug fixes
 
@@ -48,7 +49,7 @@
 
 <!--packages-start-->
 
-- @xen-orchestra/backups patch
+- @xen-orchestra/backups minor
 - @xen-orchestra/fs minor
 - @xen-orchestra/vmware-explorer minor
 - @xen-orchestra/web minor