diff --git a/inc/inc.Init.php b/inc/inc.Init.php
index 4df107c9d..66a569d06 100644
--- a/inc/inc.Init.php
+++ b/inc/inc.Init.php
@@ -32,6 +32,10 @@
 
 use Symfony\Component\HttpFoundation\Request;
 
+/* Actually not needed anymore, but some old extension may still use
+ * S_RELEASED, S_REJECTED, etc. from SeedDMS_Core_Document. So we keep
+ * it for a while. Should be removed von 6.0.31 and 5.1.38 is released.
+ */
 if (!empty($settings->_coreDir)) {
 	require_once $settings->_coreDir . '/Core.php';
 } else {