diff --git a/question/category_class.php b/question/category_class.php
index 95275559fa7..9cb1e6c01ce 100644
--- a/question/category_class.php
+++ b/question/category_class.php
@@ -371,7 +371,7 @@ class question_category_object {
         $vars = new stdClass;
         $vars->name = $category->name;
         $vars->count = $questionsincategory;
-        print_simple_box(get_string("categorymove", "quiz", $vars), "center");
+        print_box(get_string('categorymove', 'quiz', $vars), 'generalbox boxaligncenter');
         $this->moveform->display();
     }