diff --git a/mod/url/settings.php b/mod/url/settings.php
index a19f657be..53e0dfe8c 100644
--- a/mod/url/settings.php
+++ b/mod/url/settings.php
@@ -34,11 +34,13 @@ if ($ADMIN->fulltree) {
                                                            RESOURCELIB_DISPLAY_OPEN,
                                                            RESOURCELIB_DISPLAY_NEW,
                                                            RESOURCELIB_DISPLAY_POPUP,
+                                                           RESOURCELIB_DISPLAY_PREVIEW,
                                                           ));
     $defaultdisplayoptions = array(RESOURCELIB_DISPLAY_AUTO,
                                    RESOURCELIB_DISPLAY_EMBED,
                                    RESOURCELIB_DISPLAY_OPEN,
                                    RESOURCELIB_DISPLAY_POPUP,
+                                   RESOURCELIB_DISPLAY_PREVIEW,
                                   );
 
     //--- general settings -----------------------------------------------------------------------------------