diff --git a/bacnet-stack/doc/README.todo b/bacnet-stack/doc/README.todo
index e42422b3..b1470974 100644
--- a/bacnet-stack/doc/README.todo
+++ b/bacnet-stack/doc/README.todo
@@ -26,3 +26,4 @@ P. Convert datalink methods to use function pointers that can be
    overridden in main.c.
 Q. Create BACnet router code that uses more than one datalink.
 R. splint the code.  Make intelligent fixes.
+S. Fix src/mstp.c so that indent can parse it correctly.