diff --git a/feed-parsers/class-feed-parser-activitypub.php b/feed-parsers/class-feed-parser-activitypub.php
index 28ae2000..7bbbcfb2 100644
--- a/feed-parsers/class-feed-parser-activitypub.php
+++ b/feed-parsers/class-feed-parser-activitypub.php
@@ -689,7 +689,7 @@ private function disable_polling( User_Feed $user_feed ) {
 	public function get_activitypub_actor( $user_id ) {
 		if ( null === $user_id ) {
 			$user_id = Friends::get_main_friend_user_id();
-			if ( class_exists( '\ActivityPub\Collection\Followers' ) ) {
+			if ( \defined( 'ACTIVITYPUB_ACTOR_MODE' ) ) {
 				$activitypub_actor_mode = \get_option( 'activitypub_actor_mode', ACTIVITYPUB_ACTOR_MODE );
 				if ( ACTIVITYPUB_BLOG_MODE === $activitypub_actor_mode ) {
 					$user_id = \Activitypub\Collection\Actors::BLOG_USER_ID;