diff --git a/day01.livemd b/day01.livemd
index ddad0f0..0b3401f 100644
--- a/day01.livemd
+++ b/day01.livemd
@@ -7,6 +7,10 @@ Mix.install([
 ])
 ```
 
+## Run Me
+
+[![Run in Livebook](https://livebook.dev/badge/v1/blue.svg)](https://livebook.dev/run?url=https%3A%2F%2Fgit.kev.pub%2Fkev%2Faoc2024%2Fraw%2Fbranch%2Fmain%2Fday01.livemd)
+
 ## Input
 
 ```elixir
@@ -43,6 +47,6 @@ input
 
 f = Enum.frequencies(y)
 
-Enum.map(xfn xx -> xx * (f[xx] || 0) end)
+Enum.map(x, fn xx -> xx * (f[xx] || 0) end)
 |> Enum.sum
 ```