diff --git a/features/udm_user/api_udm_user.go b/features/udm_user/api_udm_user.go
index 43c3a481..492fa555 100644
--- a/features/udm_user/api_udm_user.go
+++ b/features/udm_user/api_udm_user.go
@@ -344,7 +344,7 @@ func (s *UdmUserApi) UdmAuthUserAdds(w http.ResponseWriter, r *http.Request) {
 		return
 	}
 
-	msg := fmt.Sprintf("bad authdat:start_imsi=%s,sub_num=%s,ki=%s,amf=%s,algo=%s", body.Imsi, num, body.Ki, body.Amf, body.AlgoIndex)
+	msg := fmt.Sprintf("bad authdat:start_imsi=%s,sub_num=%s,ki=%s,amf=%s,algo=%s,opc=%s", body.Imsi, num, body.Ki, body.Amf, body.AlgoIndex, body.Opc)
 
 	// 发送MML
 	data, err := mmlclient.MMLSendMsgToString(neInfo.Ip, msg)