diff --git a/README.md b/README.md
index 4bafede..ebab050 100644
--- a/README.md
+++ b/README.md
@@ -66,7 +66,7 @@ or
 
 ```swift
 var i = 1
-standardinput.lines() |> map {line in "line \(i++): \(line)\n"} |> writeTo(standardoutput)
+standardinput.lines() |> map {line in "line \(i++): \(line)\n"} |>> standardoutput
 ```
 
 Launch with e.g. `ls | print_linenumbers.swift`