diff --git a/runtime/doc/quickref.txt b/runtime/doc/quickref.txt
index 551b1ad..96c5cfb 100644
--- a/runtime/doc/quickref.txt
+++ b/runtime/doc/quickref.txt
@@ -912,6 +912,8 @@
 'ttymouse'	  'ttym'    type of mouse codes generated
 'ttyscroll'	  'tsl'     maximum number of lines for a scroll
 'ttytype'	  'tty'     alias for 'term'
+'undodir'	  'udir'    where to store undo files
+'undofile'	  'udf'	    save undo information in a file
 'undolevels'	  'ul'	    maximum number of changes that can be undone
 'updatecount'	  'uc'	    after this many characters flush swap file
 'updatetime'	  'ut'	    after this many milliseconds flush swap file