diff --git a/lib/classes/plugininfo/webservice.php b/lib/classes/plugininfo/webservice.php
index dce102dc6c9..886e831120c 100644
--- a/lib/classes/plugininfo/webservice.php
+++ b/lib/classes/plugininfo/webservice.php
@@ -33,7 +33,7 @@ defined('MOODLE_INTERNAL') || die();
 class webservice extends base {
     /**
      * Finds all enabled plugins, the result may include missing plugins.
-     * @return array|null of enabled plugins $pluginname=>$pluginname, null means unknown
+     * @return array of enabled plugins $pluginname => $pluginname
      */
     public static function get_enabled_plugins() {
         global $CFG;