diff --git a/TO-DO-List.md b/TO-DO-List.md
index 07e00e2..fe299ad 100644
--- a/TO-DO-List.md
+++ b/TO-DO-List.md
@@ -472,7 +472,7 @@ Contents:
      is outside the ASCII range.  Could be global, could be custom.
    * Define a way to specify symbols for indexed vs. non-indexed access
      to memory-mapped I/O locations.  Useful for things like Apple
-     Disk ][ symbols.  ( https://github.com/fadden/6502bench/issues/80 )
+     Disk \]\[ symbols.  (https://github.com/fadden/6502bench/issues/80)
 
  * Enhance extension scripts.
    * Define file access primitives so scripts have limited access to files