diff --git a/util/COPYRIGHT.NAI b/util/COPYRIGHT.NAI
new file mode 100644
index 0000000000..6ed86f5751
--- /dev/null
+++ b/util/COPYRIGHT.NAI
@@ -0,0 +1,15 @@
+Portions Copyright (C) 1999, 2000  Internet Software Consortium.
+
+Permission to use, copy, modify, and distribute this software for any
+purpose with or without fee is hereby granted, provided that the above
+copyright notice and this permission notice appear in all copies.
+
+THE SOFTWARE IS PROVIDED "AS IS" AND INTERNET SOFTWARE CONSORTIUM AND
+NETWORK ASSOCIATES DISCLAIM ALL WARRANTIES WITH REGARD TO THIS
+SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND
+FITNESS. IN NO EVENT SHALL INTERNET SOFTWARE CONSORTIUM OR NETWORK
+ASSOCIATES BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR
+CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF
+USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR
+OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
+PERFORMANCE OF THIS SOFTWARE.
diff --git a/util/copyrights b/util/copyrights
index 0d83f42cbf..ef555e32ef 100644
--- a/util/copyrights
+++ b/util/copyrights
@@ -562,8 +562,16 @@
 ./lib/dns/sec/dnssafe/Makefile.in		MAKE	1998,1999,2000
 ./lib/dns/sec/dst/.cvsignore			X	1999,2000
 ./lib/dns/sec/dst/Makefile.in			MAKE	1998,1999,2000
+./lib/dns/sec/dst/bsafe_lin.c			C.NAI	1999,2000
+./lib/dns/sec/dst/dst_api.c			C.NAI	1999,2000
+./lib/dns/sec/dst/dst_parse.c			C.NAI	1999,2000
 ./lib/dns/sec/dst/dst_lib.c			C	1999,2000
+./lib/dns/sec/dst/dst_support.c			C.NAI	1999,2000
 ./lib/dns/sec/dst/dst_result.c			C	1999,2000
+./lib/dns/sec/dst/hmac_link.c			C.NAI	1999,2000
+./lib/dns/sec/dst/openssl_link.c		C.NAI	1999,2000
+./lib/dns/sec/dst/openssldh_link.c		C.NAI	1999,2000
+./lib/dns/sec/dst/opensslmd5_link.c		C.NAI	1999,2000
 ./lib/dns/sec/dst/include/.cvsignore		X	2000
 ./lib/dns/sec/dst/include/Makefile.in		MAKE	1998,1999,2000
 ./lib/dns/sec/dst/include/dst/.cvsignore	X	2000
diff --git a/util/update_copyrights b/util/update_copyrights
index eb456fc250..b3dd6c0b09 100644
--- a/util/update_copyrights
+++ b/util/update_copyrights
@@ -31,10 +31,14 @@ while (<>) {
 	print "$file: missing\n";
 	next;
     }
-    if ($type eq "X") {
-	if ( ! -f $file ) {
-	    print "$file: type X, but missing\n";
-	}
+
+    next if $type eq "X";
+
+    if ($type =~ /\.NAI$/) {
+	# XXX Not handled yet; co-copyrighted with Network Associates.
+	# lib/isc/commandline.c should probably also have special handling.
+	print "$file: co-copyrighted with Network Associates; ",
+              "update manually\n";
 	next;
     }