diff --git a/README.md b/README.md
index bd3e182..1196b73 100644
--- a/README.md
+++ b/README.md
@@ -50,3 +50,11 @@ This is a personal project that I am writing in my free time to learn more about
 garbage collection. Thank you to [Robert
 Nystrom](https://journal.stuffwithstuff.com/2013/12/08/babys-first-garbage-collector/)
 for the idea.
+
+### Malloc
+
+Sadly, it was this author's idea to extend the project by writing a custom
+`malloc`. Perhaps I should have been lazy and used the preexisting definitions,
+but where's the fun in that? You can find the code on the
+[malloc](https://codeberg.org/andyscott/marCsweep/src/branch/malloc) branch,
+but be aware that it's still highly experimental!