diff --git a/lib/_stream_readable.js b/lib/_stream_readable.js
index 9438bf92d3..0844604d96 100644
--- a/lib/_stream_readable.js
+++ b/lib/_stream_readable.js
@@ -671,7 +671,7 @@ Readable.prototype.unpipe = function(dest) {
   if (index === -1)
     return this;
 
-  state.pipes.splice(i, 1);
+  state.pipes.splice(index, 1);
   state.pipesCount -= 1;
   if (state.pipesCount === 1)
     state.pipes = state.pipes[0];