diff --git a/runtime/doc/change.txt b/runtime/doc/change.txt
index fc0b1c9..3476ab2 100644
--- a/runtime/doc/change.txt
+++ b/runtime/doc/change.txt
@@ -1,4 +1,4 @@
-*change.txt*    For Vim version 7.0aa.  Last change: 2005 Jul 30
+*change.txt*    For Vim version 7.0aa.  Last change: 2005 Aug 14
 
 
 		  VIM REFERENCE MANUAL    by Bram Moolenaar
@@ -1534,4 +1534,8 @@
 guarantee that sorting is "stable" or obeys the current locale.  You will have
 to try it out.
 
+The sorting itself cannot be interrupted, because of using a system library
+function.  You can interrupt the preparation (for undo) and putting the sorted
+lines into the buffer.  In the last case you may end up with duplicated lines.
+
  vim:tw=78:ts=8:ft=help:norl: