diff --git a/admin/include/add_core_tabs.inc.php b/admin/include/add_core_tabs.inc.php
index 2c05142b5..92a90c71f 100644
--- a/admin/include/add_core_tabs.inc.php
+++ b/admin/include/add_core_tabs.inc.php
@@ -119,7 +119,7 @@ function add_core_tabs($sheets, $tab_id)
case 'photo':
global $admin_photo_base_url;
- $sheets['properties'] = array('caption' => l10n('Properties'), 'url' => $admin_photo_base_url.'-properties');
+ $sheets['properties'] = array('caption' => ''.l10n('Properties'), 'url' => $admin_photo_base_url.'-properties');
$sheets['coi'] = array('caption' => ''.l10n('Center of interest'), 'url' => $admin_photo_base_url.'-coi');
break;