diff --git a/src/codegen.inc.php b/src/codegen.inc.php
index aad2a8f..092cba1 100644
--- a/src/codegen.inc.php
+++ b/src/codegen.inc.php
@@ -339,7 +339,7 @@ function defaultValue(mtgMetaField $field)
 function parseMetaField(string $str, mtgMetaInfo $meta): mtgMetaField
 {
   list($name, $type) = explode('|', $str);
-  return new mtgMetaField($name, new mtgTypeRef(new mtgBuiltinType($type), $meta));
+  return new mtgMetaField($name, new mtgTypeRef(new mtgBuiltinType($type)));
 }
 
 function go_type(\mtgType $type, array $tokens = array())