diff --git a/edns.go b/edns.go
index 8e4256d5..1c0677c8 100644
--- a/edns.go
+++ b/edns.go
@@ -263,7 +263,7 @@ func (e *EDNS0_NSID) copy() EDNS0           { return &EDNS0_NSID{e.Code, e.Nsid}
 //	o.Hdr.Name = "."
 //	o.Hdr.Rrtype = dns.TypeOPT
 //	e := new(dns.EDNS0_SUBNET)
-//	e.Code = dns.EDNS0SUBNET
+//	e.Code = dns.EDNS0SUBNET // by default this is filled in through unpacking OPT packets (unpackDataOpt)  
 //	e.Family = 1	// 1 for IPv4 source address, 2 for IPv6
 //	e.SourceNetmask = 32	// 32 for IPV4, 128 for IPv6
 //	e.SourceScope = 0