diff --git a/lib/Models/Helpers.php b/lib/Models/Helpers.php
index 00fc163c..4301214a 100644
--- a/lib/Models/Helpers.php
+++ b/lib/Models/Helpers.php
@@ -334,6 +334,10 @@ public static function filterACLs($acls, $studip_acls)
 
         $possible_roles = array_column($studip_acls, 'role');
 
+        if (\Config::get()->OPENCAST_ALLOW_PUBLIC_SHARING) {
+            $possible_roles[] = 'ROLE_ANONYMOUS';
+        }
+
         sort($acls);
 
         $result = [];