diff --git a/sonoff/xdrv_16_tuyadimmer.ino b/sonoff/xdrv_16_tuyadimmer.ino
index 78c7ab7f9..e47e3a922 100644
--- a/sonoff/xdrv_16_tuyadimmer.ino
+++ b/sonoff/xdrv_16_tuyadimmer.ino
@@ -310,6 +310,9 @@ void TuyaRequestState(){
 
 void TuyaInit()
 {
+  if (!Settings.param[P_TUYA_DIMMER_ID]) {
+    Settings.param[P_TUYA_DIMMER_ID] = TUYA_DIMMER_ID;
+  }
   TuyaSerial = new TasmotaSerial(pin[GPIO_TUYA_RX], pin[GPIO_TUYA_TX], 1);
   if (TuyaSerial->begin(9600)) {
     if (TuyaSerial->hardwareSerial()) { ClaimSerial(); }