--- modules/locale/locale.install	2008-07-01 18:47:59.355527525 +0300
+++ modules/locale/locale.install.afief	2008-07-03 09:11:49.396524157 +0300
@@ -12,7 +12,7 @@ function locale_install() {
   // Create tables.
   drupal_install_schema('locale');
 
-  db_query("INSERT INTO {languages} (language, name, native, direction, enabled, weight, javascript) VALUES ('en', 'English', 'English', '0', '1', '0', '')");
+  db_query("INSERT INTO {languages} (language, name, native, direction, enabled, weight, javascript,prefix) VALUES ('en', 'English', 'English', '0', '1', '0', '','en')");
 }
 
 /**