diff --git a/lang/arabic.inc.php3 b/lang/arabic-windows-1256.inc.php3
similarity index 100%
rename from lang/arabic.inc.php3
rename to lang/arabic-windows-1256.inc.php3
diff --git a/lang/brazilian_portuguese.inc.php3 b/lang/brazilian_portuguese-iso-8859-1.inc.php3
similarity index 100%
rename from lang/brazilian_portuguese.inc.php3
rename to lang/brazilian_portuguese-iso-8859-1.inc.php3
diff --git a/lang/sync_lang.sh b/lang/sync_lang.sh
index 6c78b974a..b1467e54e 100755
--- a/lang/sync_lang.sh
+++ b/lang/sync_lang.sh
@@ -13,8 +13,8 @@
 # The name is filename without inc.php3.
 #
 BASE_TRANSLATIONS=`cat <<EOT
-albanian
-arabic
+albanian-iso-8859-1
+arabic-windows-1256
 brazilian_portuguese
 bulgarian-koi8
 catala
diff --git a/libraries/select_lang.lib.php3 b/libraries/select_lang.lib.php3
index dc41d5005..c83e609ff 100644
--- a/libraries/select_lang.lib.php3
+++ b/libraries/select_lang.lib.php3
@@ -40,7 +40,7 @@ $lang_path = 'lang/';
  * example.
  */
 $available_languages = array(
-    'ar'           => array('ar([-_][[:alpha:]]{2})?|arabic', 'arabic', 'ar'),
+    'ar-win1256'   => array('ar([-_][[:alpha:]]{2})?|arabic', 'arabic-windows-1256', 'ar'),
     'bg-win1251'   => array('bg|bulgarian', 'bulgarian-win1251', 'bg'),
     'bg-koi8r'     => array('bg|bulgarian', 'bulgarian-koi8', 'bg'),
     'ca-iso-8859-1'=> array('ca|catalan', 'catalan-iso-8859-1', 'ca'),