diff --git a/scripts/base/protocols/ssl/consts.bro b/scripts/base/protocols/ssl/consts.bro
index 9d8bc68fd5..b0656eab58 100644
--- a/scripts/base/protocols/ssl/consts.bro
+++ b/scripts/base/protocols/ssl/consts.bro
@@ -69,6 +69,7 @@ export {
 		[13] = "signature_algorithms",
 		[14] = "use_srtp",
 		[35] = "SessionTicket TLS",
+		[13172] = "next_protocol_negotiation",
 		[65281] = "renegotiation_info"
 	} &default=function(i: count):string { return fmt("unknown-%d", i); };