--- wire/peer_exp_wire.csv	2020-12-07 14:17:07.322636209 +1030
+++ -	2020-12-08 11:05:50.990733421 +1030
@@ -310,7 +211,8 @@
 msgdata,gossip_timestamp_filter,first_timestamp,u32,
 msgdata,gossip_timestamp_filter,timestamp_range,u32,
 msgtype,onion_message,385,option_onion_messages
-msgdata,onion_message,onionmsg,byte,1366
+msgdata,onion_message,len,u16,
+msgdata,onion_message,onionmsg,byte,len
 msgdata,onion_message,onion_message_tlvs,onion_message_tlvs,
 tlvtype,onion_message_tlvs,blinding,2
 tlvdata,onion_message_tlvs,blinding,blinding,point,