diff --git a/eZ/Publish/Core/MVC/Legacy/LegacyEvents.php b/eZ/Publish/Core/MVC/Legacy/LegacyEvents.php
index <HASH>..<HASH> 100644
--- a/eZ/Publish/Core/MVC/Legacy/LegacyEvents.php
+++ b/eZ/Publish/Core/MVC/Legacy/LegacyEvents.php
@@ -33,5 +33,10 @@ final class LegacyEvents
      */
     const PRE_BUILD_LEGACY_KERNEL = 'ezpublish_legacy.build_kernel';
 
+    /**
+     * The POST_BUILD_LEGACY_KERNEL event occurs after legacy kernel has been built (whatever handler is used).
+     *
+     * The event listener method receives a \eZ\Publish\Core\MVC\Legacy\Event\PostBuildKernelEvent
+     */
     const POST_BUILD_LEGACY_KERNEL = 'ezpublish_legacy.post_build_kernel';
 }
EZP-<I>: Added PHPDoc for POST_BUILD_LEGACY_KERNEL event

[ci skip]