diff --git a/lib/6to5/file.js b/lib/6to5/file.js
index adbcfa9ba7..9cdb87b108 100644
--- a/lib/6to5/file.js
+++ b/lib/6to5/file.js
@@ -349,7 +349,6 @@ File.prototype.generate = function () {
 
   var result = {
     code: "",
-    opts: opts,
     map: null,
     ast: null
   };