diff --git a/winsup/cygwin/how-signals-work.txt b/winsup/cygwin/how-signals-work.txt
index f5cb04aff..26e5ee1ba 100644
--- a/winsup/cygwin/how-signals-work.txt
+++ b/winsup/cygwin/how-signals-work.txt
@@ -1,5 +1,6 @@
-Copyright 2001 Red Hat Inc., Christopher Faylor
+Copyright 2001, 2002, 2003 Red Hat Inc., Christopher Faylor
 
+[this information is currently out-of-date]
 How do signals work?
 
 On process startup, cygwin starts a secondary thread that deals with signals.