diff --git a/ToDo b/ToDo
index 3d12ba7..91a51b8 100644
--- a/ToDo
+++ b/ToDo
@@ -12,6 +12,7 @@
 - refactoring: CodeGeneratorOptions should not provide PeepholeOptimizer
 - refactoring: classify Assembler
 - refactoring: classify Linker
+* use enum for register names
 
 == Done