diff --git a/docs/source/todo.rst b/docs/source/todo.rst
index 6032da960..e61b57b4b 100644
--- a/docs/source/todo.rst
+++ b/docs/source/todo.rst
@@ -4,6 +4,7 @@ TODO
 
 - optimize word multiplication if the constant multiplier is a multiple of 256
 - move current rnd() to fastrnd() and add new rnd() based on the 16-bits rndw() for better results
+- add more convenient number-to-string conversion routines to conv (and clean up the number printing routine in the blobs example?)
 
 - optimize assigning array and struct variables (multi-element assings -> memcopy)
 - hoist all variable declarations up to the subroutine scope *before* even the constant folding takes place (to avoid undefined symbol errors when referring to a variable from another nested scope in the subroutine)