diff --git a/usr.sbin/mountd/exports.5 b/usr.sbin/mountd/exports.5
index 6e4dae4ee1f..4d7b97666ee 100644
--- a/usr.sbin/mountd/exports.5
+++ b/usr.sbin/mountd/exports.5
@@ -178,6 +178,9 @@ flag, which implies
 .Sm on
 and
 .Fl ro .
+Note that only one filesystem can be
+.Tn WebNFS
+exported on a server.
 .Pp
 A
 .Sm off