--- image.admin.inc	2010-09-23 13:30:54.000000000 +0200
+++ image.admin.inc	2010-09-23 13:43:01.000000000 +0200
@@ -43,6 +43,7 @@ function image_admin_settings() {
     IMAGE_LINK_HIDDEN => t('Hidden'),
     IMAGE_LINK_SHOWN => t('Same window'),
     IMAGE_LINK_NEW => t('New window'),
+    IMAGE_LINK_DIRECT_LINK => t('Direct link to file'), 
   );
 
   $sizes = image_get_sizes();