diff --git a/man2/pidfd_open.2 b/man2/pidfd_open.2
index 9443f3baf..7adad55c3 100644
--- a/man2/pidfd_open.2
+++ b/man2/pidfd_open.2
@@ -91,6 +91,27 @@ is Linux specific.
 Currently, there is no glibc wrapper for this system call; call it using
 .BR syscall (2).
 .PP
+The following code sequence can be used to obtain a file descriptor
+for the child of
+.BR fork (2):
+.PP
+.in +4n
+.EX
+pid = fork();
+if (pid > 0) {     /* If parent */
+    pidfd = pidfd_open(pid, 0);
+    ...
+}
+.EE
+.in
+.PP
+Even if the child process has already terminated by the time of the
+.BR pidfd_open ()
+call, the returned file descriptor
+is guaranteed to refer to the child because
+the parent has not yet waited on the child
+(and therefore, the child's ID has not been recycled).
+.PP
 The
 .BR pidfd_send_signal (2)
 system call can be used to send a signal to the process referred to by