diff --git a/src/codegen.inc.php b/src/codegen.inc.php
index b3b424b..7a5ffe2 100644
--- a/src/codegen.inc.php
+++ b/src/codegen.inc.php
@@ -77,7 +77,7 @@ function _add_twig_support(\Twig\Environment $twig)
   $twig->addFunction(new \Twig\TwigFunction('has_token', 
     function($o, $token) 
     { 
-      return $o->hasToken($token);
+      return (($o instanceof \mtgMetaUnit) || ($o instanceof \mtgMetaField)) && $o->hasToken($token);
     }
   ));
   $twig->addFunction(new \Twig\TwigFunction('has_token_in_parent',