diff --git a/src/input/mpegts/mpegts_network_dvb.c b/src/input/mpegts/mpegts_network_dvb.c
index 549331888..99cb27594 100644
--- a/src/input/mpegts/mpegts_network_dvb.c
+++ b/src/input/mpegts/mpegts_network_dvb.c
@@ -673,6 +673,7 @@ dvb_network_create_mux
     save |= cls == &dvb_mux_dvbs_class && dmc->dmc_fe_type == DVB_TYPE_S;
     save |= cls == &dvb_mux_atsc_t_class && dmc->dmc_fe_type == DVB_TYPE_ATSC_T;
     save |= cls == &dvb_mux_atsc_c_class && dmc->dmc_fe_type == DVB_TYPE_ATSC_C;
+    tvhwarn(LS_MPEGTS, "1: save %d cls %p dvbc_class %p atsc_c_class %p", save, cls, &dvb_mux_dvbc_class, &dvb_mux_atsc_c_class);
     if (save && dmc->dmc_fe_type == DVB_TYPE_S) {
       satpos = dvb_network_get_orbital_pos(mn);
       /* do not allow to mix satellite positions */