diff --git a/lib/_stream_transform.js b/lib/_stream_transform.js
index 2814d1ed2b1..8a00d343b60 100644
--- a/lib/_stream_transform.js
+++ b/lib/_stream_transform.js
@@ -70,8 +70,6 @@ util.inherits(Transform, Duplex);
 
 
 function TransformState(options, stream) {
-  var ts = this;
-
   this.afterTransform = function(er, data) {
     return afterTransform(stream, er, data);
   };