diff --git a/README.md b/README.md
index 5b816ab..d6eca71 100644
--- a/README.md
+++ b/README.md
@@ -14,7 +14,7 @@
 
 *Normal users of the LaTeX repository should ignore the following!*
 
-The `beamerthemes`, `listings`, and `ouexam` subdirectories are git subtrees pointing to independent repositories. If you’re intending to edit the contents of these directories, you make a separate clone of the original repository.
+The `beamerthemes`, `lectures`, `listings`, and `ouexam` subdirectories are git subtrees pointing to independent repositories. If you’re intending to edit the contents of these directories, you make a separate clone of the original repository.
 
 To pull upstream changes to the subtrees (e.g., for `ouexam`): `git subtree pull --prefix=ouexam --squash ouexam master`