diff --git a/CHANGELOG.unreleased.md b/CHANGELOG.unreleased.md
index 1f5093e19..44160e68e 100644
--- a/CHANGELOG.unreleased.md
+++ b/CHANGELOG.unreleased.md
@@ -13,6 +13,7 @@
 
 > Users must be able to say: “I had this issue, happy to know it's fixed”
 
+- [VM/Advanced] Fix virtualization mode switch (PV/HVM) (PR [#4349](https://github.com/vatesfr/xen-orchestra/pull/4349))
 
 ### Released packages
 
diff --git a/packages/xo-server/src/api/vm.js b/packages/xo-server/src/api/vm.js
index 8ff2e7815..9530983a7 100644
--- a/packages/xo-server/src/api/vm.js
+++ b/packages/xo-server/src/api/vm.js
@@ -631,6 +631,8 @@ set.params = {
 
   // set the VM boot firmware mode
   hvmBootFirmware: { type: ['string', 'null'], optional: true },
+
+  virtualizationMode: { type: 'string', optional: true },
 }
 
 set.resolve = {