diff --git a/bacnet-stack/doc/README.todo b/bacnet-stack/doc/README.todo
index a797ca3b..9558ecde 100644
--- a/bacnet-stack/doc/README.todo
+++ b/bacnet-stack/doc/README.todo
@@ -30,3 +30,4 @@ S. Fix src/mstp.c so that indent can parse it correctly.
 T. Add "inline" to static functions that are only used once.
 U. Modify code to compile with MISRA C rules.
 V. Change OBJECT_ID to only be 32 bits, and add macro handlers.
+W. Add #ifdef for all MAX_ defines so they can be overridden.