diff --git a/usr.sbin/kldxref/kldxref.8 b/usr.sbin/kldxref/kldxref.8
--- a/usr.sbin/kldxref/kldxref.8
+++ b/usr.sbin/kldxref/kldxref.8
@@ -52,11 +52,14 @@
 that directory) is removed.
 .Pp
 .Nm
-ignores files with two "."s in the filename, such as
+ignores files with at least two "."s in the filename, such as
 .Pa foo.ko.debug
 or
-.Pa bar.ko.pkgsave
-.
+.Pa bar.ko.pkgsave .
+Note that this means that modules cannot have names such as
+.Pa foo.bar.ko .
+This limitation however, has been lived practice since the beginning of
+FreeBSD's kernel modules.
 .Pp
 The following options are available:
 .Bl -tag -width indent