diff --git a/blog/preferences.php b/blog/preferences.php
index b3b20581709..ad798e584b3 100755
--- a/blog/preferences.php
+++ b/blog/preferences.php
@@ -49,9 +49,9 @@
     print_header("$site->shortname: $strblogs : $strpreferences", $strblogs, $navigation);
     echo $OUTPUT->heading($strpreferences);
 
-    print_simple_box_start('center', '', '');
+    echo $OUTPUT->box_start('generalbox boxaligncenter');
     require('./preferences.html');
-    print_simple_box_end();
+    echo $OUTPUT->box_end();
 
     echo $OUTPUT->footer();
 ?>