diff --git a/man3/on_exit.3 b/man3/on_exit.3
index 3741be8e3..e03d95cac 100644
--- a/man3/on_exit.3
+++ b/man3/on_exit.3
@@ -26,7 +26,7 @@
 .\"     386BSD man pages
 .\" Modified 1993-04-02, David Metcalfe
 .\" Modified 1993-07-25, Rik Faith (faith@cs.unc.edu)
-.TH ON_EXIT 3  2007-07-26 "GNU" "Linux Programmer's Manual"
+.TH ON_EXIT 3  2008-12-05 "GNU" "Linux Programmer's Manual"
 .SH NAME
 on_exit \- register a function to be called at normal process termination
 .SH SYNOPSIS
@@ -54,6 +54,9 @@ The \fIfunction\fP is passed the argument to
 .BR exit (3)
 and the \fIarg\fP argument from
 .BR on_exit ().
+
+The same function may be registered multiple times:
+it is called once for each registration.
 .SH "RETURN VALUE"
 The
 .BR on_exit ()