diff --git a/lib/6to5/transformation/modules/amd.js b/lib/6to5/transformation/modules/amd.js
index 98f0f82c54..4c046d5f98 100644
--- a/lib/6to5/transformation/modules/amd.js
+++ b/lib/6to5/transformation/modules/amd.js
@@ -5,7 +5,7 @@ var util             = require("../../util");
 var t                = require("../../types");
 var _                = require("lodash");
 
-function AMDFormatter(file) {
+function AMDFormatter() {
   DefaultFormatter.apply(this, arguments);
   this.ids  = {};
 }