diff --git a/htdocs/lib/i18n.php b/htdocs/lib/i18n.php
index 5442900..12ec1e0 100644
--- a/htdocs/lib/i18n.php
+++ b/htdocs/lib/i18n.php
@@ -42,7 +42,7 @@ function url_translate ($url, $to) {
   
   $name= basename ($url);
   $index= array_search ($name, $registered_languages[$from]['pages']);
-  if (!$index)
+  if ($index === false)
     return $registered_languages[$to]['loc'];
   return $registered_languages[$to]['loc'] . $registered_languages[$to]['pages'][$index];
 }