diff --git a/runtime/doc/todo.txt b/runtime/doc/todo.txt
index c1a02fc..5660390 100644
--- a/runtime/doc/todo.txt
+++ b/runtime/doc/todo.txt
@@ -1,4 +1,4 @@
-*todo.txt*      For Vim version 7.0aa.  Last change: 2005 Aug 05
+*todo.txt*      For Vim version 7.0aa.  Last change: 2005 Aug 08
 
 
 		  VIM REFERENCE MANUAL	  by Bram Moolenaar
@@ -30,6 +30,8 @@
 							*known-bugs*
 -------------------- Known bugs and current work -----------------------
 
+Spell checking: code for pre-compressing tree. (Olaf Seibert)
+
 Mac unicode patch (Da Woon Jung):
 - selecting proportional font breaks display
 - UTF-8 text causes display problems.  Font replacement causes this.