diff --git a/lib/6to5/polyfill.js b/lib/6to5/polyfill.js
index 2cf4d1784d..9e98ba264a 100644
--- a/lib/6to5/polyfill.js
+++ b/lib/6to5/polyfill.js
@@ -1,4 +1,4 @@
-//
+/* jshint newcap: false */
 
 var ensureSymbol = function (key) {
   Symbol[key] = Symbol[key] || Symbol();
@@ -24,7 +24,7 @@ ensureSymbol("referenceGet");
 ensureSymbol("referenceSet");
 ensureSymbol("referenceDelete");
 
-ensureProto(Function, Symbol.referenceGet, function () { return this });
+ensureProto(Function, Symbol.referenceGet, function () { return this; });
 
 ensureProto(Map, Symbol.referenceGet, Map.prototype.get);
 ensureProto(Map, Symbol.referenceSet, Map.prototype.set);
diff --git a/lib/6to5/transformation/transformers/es7-abstract-references.js b/lib/6to5/transformation/transformers/es7-abstract-references.js
index a8cd071237..c17d9924d2 100644
--- a/lib/6to5/transformation/transformers/es7-abstract-references.js
+++ b/lib/6to5/transformation/transformers/es7-abstract-references.js
@@ -40,7 +40,7 @@ exports.UnaryExpression = function (node, parent) {
   return container(parent, call, t.literal(true));
 };
 
-exports.CallExpression = function (node, parent) {
+exports.CallExpression = function (node) {
   var callee = node.callee;
   if (!t.isVirtualPropertyExpression(callee)) return;