diff --git a/README.md b/README.md
index 5635209..0027d40 100644
--- a/README.md
+++ b/README.md
@@ -101,7 +101,7 @@ var fs = require("fs")
 
 var input = fs.readFileSync("index.css", "utf8")
 
-var output = cssnext(css)
+var output = cssnext(input)
 fs.writeFileSync("dist/index.css", output)
 ```