diff --git a/migrations/54-60/removed-backward-incompatibility.md b/migrations/54-60/removed-backward-incompatibility.md
index 44ce6864..11e79edb 100644
--- a/migrations/54-60/removed-backward-incompatibility.md
+++ b/migrations/54-60/removed-backward-incompatibility.md
@@ -22,3 +22,8 @@ There should be an explanation of how to mitigate the removals / changes.
 
 - PR: https://github.com/joomla/joomla-cms/pull/42884
 - Description: The class `\Joomla\CMS\Application\BaseApplication` and `\Joomla\CMS\Application\CliApplication` respective CLI input classes have been removed. The CMS core code has been switched to use the Application package of the Joomla Framework. Any reference to these classes should be replaced with the namespace `\Joomla\Application`. Cli apps should be replaced by console plugins.
+
+### CMS Adapter classes have been remoed
+
+- PR: https://github.com/joomla/joomla-cms/pull/43794
+- Description: The classes `\Joomla\CMS\Adapter\Adapter` and `\Joomla\CMS\Adapter\AdapterInstance` have been removed without replacement.