diff --git a/system/src/Grav/Common/Twig/TwigExtension.php b/system/src/Grav/Common/Twig/TwigExtension.php
index 26232b1dc..43d3cddf4 100644
--- a/system/src/Grav/Common/Twig/TwigExtension.php
+++ b/system/src/Grav/Common/Twig/TwigExtension.php
@@ -841,7 +841,7 @@ class TwigExtension extends \Twig_Extension
     /**
      * detect (in)humane agent
      *
-     * @return 
+     * @return true if human, false if bot
      */
     public function isHuman()
     {