diff --git a/runtime/doc/todo.txt b/runtime/doc/todo.txt
index 76bdc17..bd0c07c 100644
--- a/runtime/doc/todo.txt
+++ b/runtime/doc/todo.txt
@@ -1,4 +1,4 @@
-*todo.txt*      For Vim version 8.2.  Last change: 2022 Feb 09
+*todo.txt*      For Vim version 8.2.  Last change: 2022 Feb 11
 
 
 		  VIM REFERENCE MANUAL	  by Bram Moolenaar
@@ -38,6 +38,9 @@
 							*known-bugs*
 -------------------- Known bugs and current work -----------------------
 
+Disallow using "s:" in Vim9 script at the script level.
+Disallow a legacy function creating an s: variable in Vim9 script.
+
 Once Vim9 is stable:
 - Use Vim9 for runtime files.
 - Check code coverage, add more tests if needed.