diff --git a/src/ems.cpp b/src/ems.cpp
index c6312a8b9..b13464664 100644
--- a/src/ems.cpp
+++ b/src/ems.cpp
@@ -1239,12 +1239,9 @@ void _process_MMPLUSStatusMessage(_EMS_RxTelegram * EMS_RxTelegram) {
     _setValue(EMS_RxTelegram, &EMS_Mixing.hc[hc].valveStatus, EMS_OFFSET_MMPLUSStatusMessage_valve_status);
 }
 
-// 0xAB, 0xAC - for MM10 HC1 and HC2 on a switch
+// 0xAB
 void _process_MMStatusMessage(_EMS_RxTelegram * EMS_RxTelegram) {
-    uint8_t hc = (EMS_RxTelegram->type - EMS_TYPE_MMStatusMessage_HC1); // 0 to 3
-    if (hc >= EMS_THERMOSTAT_MAXHC) {
-        return; // invalid type
-    }
+    uint8_t hc               = 0; // fixed, for 0xAB
     EMS_Mixing.hc[hc].active = true;
 
     _setValue(EMS_RxTelegram, &EMS_Mixing.hc[hc].flowTemp, EMS_OFFSET_MMStatusMessage_flow_temp);
@@ -2724,8 +2721,7 @@ const _EMS_Type EMS_Types[] = {
     // Mixing devices MM10 - MM400
     {EMS_DEVICE_UPDATE_FLAG_MIXING, EMS_TYPE_MMPLUSStatusMessage_HC1, "MMPLUSStatusMessage_HC1", _process_MMPLUSStatusMessage},
     {EMS_DEVICE_UPDATE_FLAG_MIXING, EMS_TYPE_MMPLUSStatusMessage_HC2, "MMPLUSStatusMessage_HC2", _process_MMPLUSStatusMessage},
-    {EMS_DEVICE_UPDATE_FLAG_MIXING, EMS_TYPE_MMStatusMessage_HC1, "MMStatusMessage", _process_MMStatusMessage},
-    {EMS_DEVICE_UPDATE_FLAG_MIXING, EMS_TYPE_MMStatusMessage_HC2, "MMStatusMessage", _process_MMStatusMessage}
+    {EMS_DEVICE_UPDATE_FLAG_MIXING, EMS_TYPE_MMStatusMessage, "MMStatusMessage", _process_MMStatusMessage}
 
 };
 
diff --git a/src/ems_devices.h b/src/ems_devices.h
index 3dc105356..5a52eb7ba 100644
--- a/src/ems_devices.h
+++ b/src/ems_devices.h
@@ -198,8 +198,7 @@ const _EMS_Device_Types EMS_Devices_Types[] = {
 #define EMS_OFFSET_MMPLUSStatusMessage_valve_status 2 // valve in percent
 
 // MM10
-#define EMS_TYPE_MMStatusMessage_HC1 0xAB         // mixer status HC1
-#define EMS_TYPE_MMStatusMessage_HC2 0xAC         // mixer status HC2
+#define EMS_TYPE_MMStatusMessage 0xAB             // mixer status
 #define EMS_OFFSET_MMStatusMessage_flow_set 0     // flow setpoint
 #define EMS_OFFSET_MMStatusMessage_flow_temp 1    // flow temperature
 #define EMS_OFFSET_MMStatusMessage_pump_mod 3     // pump modulation in percent