diff --git a/issues/todo.md b/issues/todo.md
index a410f26..77380a2 100644
--- a/issues/todo.md
+++ b/issues/todo.md
@@ -8,6 +8,7 @@ For extended commentary, see [issues](issues.md).
 
 ### Todo
 
+- (cpu) !! Fix overflow flag
 - Add a flag for bank-switching to the ~zero-page
 - Remove run-scripts and add the ability to run `./cpu.js` and `./assembler.js` directly -- cf. [#1](issues.md#1---improve-cli-interface)
 - [fix] (cpu) Make single-stepping work with simulated keypad