diff --git a/includes/lib/l10n.php b/includes/lib/l10n.php
index 4859946..c9abf74 100644
--- a/includes/lib/l10n.php
+++ b/includes/lib/l10n.php
@@ -302,9 +302,9 @@ class L10n {
 		$locale = self::$locales[$translation_code];
 
 		// set up locale
-		if ( !putenv("LANG=$locale") ) {
+		if ( !putenv("LANGUAGE=$locale") ) {
 			trigger_error("L10n::set_translation(): could not set the ".
-				"environment variable LANG to $locale", E_USER_WARNING);
+				"environment variable LANGUAGE to $locale", E_USER_WARNING);
 			return false;
 		}
 		if ( !setlocale(LC_ALL, $locale) ) {