diff --git a/lib/fullnoticestream.php b/lib/fullnoticestream.php
index 8433c18c9c..2f83007469 100644
--- a/lib/fullnoticestream.php
+++ b/lib/fullnoticestream.php
@@ -5,7 +5,7 @@ if (!defined('GNUSOCIAL')) { exit(1); }
 /**
  * Class for notice streams that does not filter anything out.
  */
-class FullNoticeStream extends NoticeStream
+abstract class FullNoticeStream extends NoticeStream
 {
     protected $selectVerbs = [];
 }