Fix preferences for sites with math enabled

diff --git a/includes/Preferences.php b/includes/Preferences.php
index 7baf308..ffa94ba 100644 (file)
--- a/includes/Preferences.php
+++ b/includes/Preferences.php
@@ -398,7 +398,7 @@ class Preferences {
        
        static function mathPreferences( $user, &$defaultPreferences ) {
                ## Math #####################################
-               global $wgUseTeX;
+               global $wgUseTeX, $wgLang;
                if ($wgUseTeX) {
                        $defaultPreferences['math'] =
                                        array(