diff --git a/lib/_stream_readable.js b/lib/_stream_readable.js
index 92a1f6ad1ed52d..afa92f1d8cc907 100644
--- a/lib/_stream_readable.js
+++ b/lib/_stream_readable.js
@@ -664,7 +664,7 @@ 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];