diff --git a/lib/6to5/generation/generator.js b/lib/6to5/generation/generator.js
index 82fce1f967..73511ec6a6 100644
--- a/lib/6to5/generation/generator.js
+++ b/lib/6to5/generation/generator.js
@@ -165,6 +165,8 @@ CodeGenerator.prototype.print = function (node, parent, opts) {
 };
 
 CodeGenerator.prototype.printJoin = function (print, nodes, opts) {
+  if (!nodes || !nodes.length) return;
+
   opts = opts || {};
 
   var self = this;