diff --git a/CHANGELOG.md b/CHANGELOG.md
index 0e41503b0ec41d4dbe819648b2b11c4cfd781c59..30dae0e20ff521b2978b29c37b16dde47390bc03 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -18,6 +18,7 @@ This is a changelog for Piwik platform developers. All changes for our HTTP API'
 * The method `Piwik\Plugin\Controller::getEvolutionHtml` has been removed without a replacement as it should be no longer needed. The evolution is generated by ViewDataTables directly
 * The `core:plugin` console command has been removed in favor of the new `plugin:list`, `plugin:activate` and `plugin:deactivate` commands as anounced in Piwik 2.11
 * The visibility of private properties and methods in `Piwik\Plugins\Login\Controller` were changed to `protected`
+* Controller actions are now case sensitive. This means the URL and events have to use the same case as the name of the action defined in a controller. 
 
 ### New APIs
 * Multiple widgets for one report can now be created via the `Report::configureWidgets()` method via the new classes `Piwik\Widget\ReportWidgetFactory` and `Piwik\Widget\ReportWidgetConfig`