diff --git a/src/hm/hmSystem.h b/src/hm/hmSystem.h
index 0266a948..22318347 100644
--- a/src/hm/hmSystem.h
+++ b/src/hm/hmSystem.h
@@ -69,6 +69,7 @@ class HmSystem {
             } else if(iv->config->serial.b[5] == 0x13) {
                     iv->ivGen = IV_HMT;
                     iv->type = INV_TYPE_6CH;
+                    iv->ivRadioType = INV_RADIO_TYPE_CMT;
             } else if(iv->config->serial.u64 != 0ULL) {
                 DPRINTLN(DBG_ERROR, F("inverter type can't be detected!"));
                 return;