diff --git a/man3/atexit.3 b/man3/atexit.3
index 68b9f0fe6..e4fd77416 100644
--- a/man3/atexit.3
+++ b/man3/atexit.3
@@ -75,6 +75,15 @@ Functions registered using
 are not called if a process terminates abnormally because
 of the delivery of a signal.
 
+The
+.BR atexit ()
+and
+.BR on_exit (3)
+functions register functions on the same list:
+at normal process termination,
+the registered functions are invoked in reverse order
+of their registration by these two functions.
+
 POSIX.1-2001 says that the result is undefined if
 .BR longjmp (3)
 is used to terminate execution of one of the functions registered