diff --git a/2022-aoc/src/lib.rs b/2022-aoc/src/lib.rs
index 31a0c97..435698c 100644
--- a/2022-aoc/src/lib.rs
+++ b/2022-aoc/src/lib.rs
@@ -3,5 +3,6 @@ use aoc_runner_derive::aoc_lib;
 mod d1;
 mod d2;
 mod d3;
+mod d4;
 
 aoc_lib! { year = 2022 }