diff --git a/lib/6to5/transformation/transformers/optional-async-to-generator.js b/lib/6to5/transformation/transformers/optional-async-to-generator.js
index 370cf08d02..91a9ef3100 100644
--- a/lib/6to5/transformation/transformers/optional-async-to-generator.js
+++ b/lib/6to5/transformation/transformers/optional-async-to-generator.js
@@ -1,5 +1,4 @@
 var bluebirdCoroutines = require("./optional-bluebird-coroutines");
-var traverse           = require("../../traverse");
 var t                  = require("../../types");
 
 exports.optional = true;