diff --git a/lib/6to5/modules/amd.js b/lib/6to5/modules/amd.js
index 5ae4c44824..b71817cdd2 100644
--- a/lib/6to5/modules/amd.js
+++ b/lib/6to5/modules/amd.js
@@ -50,7 +50,7 @@ AMDFormatter.prototype._push = function (node) {
   }
 };
 
-AMDFormatter.prototype.import = function (node, nodes) {
+AMDFormatter.prototype.import = function (node) {
   this._push(node);
 };
 
diff --git a/lib/6to5/modules/umd.js b/lib/6to5/modules/umd.js
index c727e4e939..16f9d89e52 100644
--- a/lib/6to5/modules/umd.js
+++ b/lib/6to5/modules/umd.js
@@ -1,10 +1,9 @@
 module.exports = UMDFormatter;
 
-var CommonJSFormatter = require("./common");
-var AMDFormatter      = require("./amd");
-var util              = require("../util");
-var b                 = require("ast-types").builders;
-var _                 = require("lodash");
+var AMDFormatter = require("./amd");
+var util         = require("../util");
+var b            = require("ast-types").builders;
+var _            = require("lodash");
 
 function UMDFormatter(file) {
   this.file = file;
@@ -37,7 +36,7 @@ UMDFormatter.prototype.transform = function (ast) {
     AMD_ARGUMENTS: b.arrayExpression([b.literal("exports")].concat(names)),
 
     COMMON_ARGUMENTS: names.map(function (name) {
-      return b.callExpression(b.identifier("require"), [name])
+      return b.callExpression(b.identifier("require"), [name]);
     })
   });
 
diff --git a/lib/6to5/transformers/array-comprehension.js b/lib/6to5/transformers/array-comprehension.js
index af7fc9b533..ae744c9e8c 100644
--- a/lib/6to5/transformers/array-comprehension.js
+++ b/lib/6to5/transformers/array-comprehension.js
@@ -1,6 +1,5 @@
 var util = require("../util");
 var b    = require("ast-types").builders;
-var _    = require("lodash");
 
 var single = function (node) {
   var block = node.blocks[0];