diff --git a/tsig.go b/tsig.go
index 2df7a2d2..331b50e7 100644
--- a/tsig.go
+++ b/tsig.go
@@ -34,7 +34,7 @@ func (rr *RR_TSIG) Header() *RR_Header {
 	return &rr.Hdr
 }
 
-func (rr *RR_TSIG) Defaults() {
+func (rr *RR_TSIG) SetDefaults() {
         rr.Header().Ttl = 0
         rr.Header().Class = ClassANY
         rr.Header().Rrtype = TypeTSIG