diff --git a/TODO.txt b/TODO.txt
index ae7183418..e4a9e8f07 100644
--- a/TODO.txt
+++ b/TODO.txt
@@ -2,6 +2,8 @@
 BEAST TODO
 --------------------------------------------------------------------------------
 
+- Specialize UnsignedInteger<> for peformance in the storage format
+
 - Macro for acquiring a ScopedLock that records file and line.
 
 - Rename HeapBlock routines to not conflict with _CRTDBG_MAP_ALLOC macros