diff --git a/lib/libc/sys/kqueue.2 b/lib/libc/sys/kqueue.2
index 413e418966c..07a51d3498d 100644
--- a/lib/libc/sys/kqueue.2
+++ b/lib/libc/sys/kqueue.2
@@ -34,6 +34,7 @@
 .Sh LIBRARY
 .Lb libc
 .Sh SYNOPSIS
+.Fd #include <sys/time.h>
 .Fd #include <sys/types.h>
 .Fd #include <sys/event.h>
 .Ft int
@@ -422,3 +423,6 @@ The
 .Fn kqueue
 system and this manual page were written by
 .An Jonathan Lemon Aq jlemon@FreeBSD.org .
+.Sh BUGS
+It is currently not possible to watch a vnode that resides on anything but
+a UFS file system.