diff --git a/lib/libukfs/ukfs.3 b/lib/libukfs/ukfs.3
index f23c1206b7ea..3124969eb07e 100644
--- a/lib/libukfs/ukfs.3
+++ b/lib/libukfs/ukfs.3
@@ -1,4 +1,4 @@
-.\"     $NetBSD: ukfs.3,v 1.4 2008/09/07 15:14:31 pooka Exp $
+.\"     $NetBSD: ukfs.3,v 1.5 2008/11/25 06:44:19 pooka Exp $
 .\"
 .\" Copyright (c) 2008 Antti Kantee.  All rights reserved.
 .\"
@@ -23,7 +23,7 @@
 .\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 .\" SUCH DAMAGE.
 .\"
-.Dd September 7, 2008
+.Dd November 28, 2008
 .Dt UKFS 3
 .Os
 .Sh NAME
@@ -354,3 +354,14 @@ first appeared in
 .Sh NOTES
 .Nm
 should be considered experimental technology and may change without warning.
+.Sh BUGS
+Due to how the runtime linker works, it is possible to include
+support for only one file system in dynamic binaries at linktime.
+The remaining desired file systems can be loaded with
+.Fn ukfs_modload .
+Statically linked binaries do not have this limitation, but cannot use
+.Fn ukfs_modload
+at all.
+The recommended approach is to use dynamically linked binaries and load all
+file system modules with
+.Fn ukfs_modload .