diff --git a/TODO.md b/TODO.md
index 0c82bb167..4a0d962b3 100644
--- a/TODO.md
+++ b/TODO.md
@@ -27,6 +27,9 @@
 ## Navmeshes
 
 - Add dummy nav server, so it can be turned off.
+- The current nav server uses worker threads (ThreadWorkPool), maybe it should use ThreadPool.
+- The current nav server might not work if threading is disabled. TODO check.
+- Maybe ThreadWorkPool could be removed.
 
 ## Terraman, Voxelman, Props