diff --git a/lib/adminlib.php b/lib/adminlib.php
index fa98788..6523949 100644
--- a/lib/adminlib.php
+++ b/lib/adminlib.php
@@ -4061,7 +4061,7 @@ class admin_setting_managefilters extends admin_setting {
                 $settingspath_new = "$CFG->dirroot/$filterlocation/$plugin/filtersettings.php";
                 $settingspath_old = "$CFG->dirroot/$filterlocation/$plugin/filterconfig.html";
                 if (is_readable($pluginpath)) {
-                    $name = trim(get_string("filtername", $plugin));
+                    $name = trim(get_string("filtername", "filter_$plugin"));
                     if (empty($name) or ($name == '[[filtername]]')) {
                         $textlib = textlib_get_instance();
                         $name = $textlib->strtotitle($plugin);