diff --git a/wp-business-forum.php b/wp-business-forum.php
index abb2b95..2a6a181 100644
--- a/wp-business-forum.php
+++ b/wp-business-forum.php
@@ -34,6 +34,7 @@ require_once WBF_PATH . 'includes/class-forum-export.php';
 require_once WBF_PATH . 'includes/class-forum-mc-bridge.php';
 require_once WBF_PATH . 'includes/class-forum-totp.php';
 require_once WBF_PATH . 'includes/forum-statusapi.php';
+require_once WBF_PATH . 'includes/class-forum-abo.php';
 
 /* ─── Plugin-Watch Bridge (optional — nur wenn MC Plugin aktiv) ── */
 $wbf_plugin_watch = WBF_PATH . 'includes/forum-plugin-watch.php';