diff --git a/lib/default/TasmotaSerial-3.6.0/src/TasmotaSerial.cpp b/lib/default/TasmotaSerial-3.6.0/src/TasmotaSerial.cpp
index e54692ab5..18cfee1e0 100644
--- a/lib/default/TasmotaSerial-3.6.0/src/TasmotaSerial.cpp
+++ b/lib/default/TasmotaSerial-3.6.0/src/TasmotaSerial.cpp
@@ -228,7 +228,7 @@ bool TasmotaSerial::begin(uint32_t speed, uint32_t config) {
 #ifdef ESP32
     if (TSerial == nullptr) {      // Allow for dynamic change in baudrate or config
       if (freeUart()) {            // We prefer UART1 and UART2 and keep UART0 for debugging
-#ifdef ARDUINO_USB_CDC_ON_BOOT
+#if ARDUINO_USB_MODE
         TSerial = new HardwareSerial(m_uart);
 #else
         if (0 == m_uart) {
@@ -239,7 +239,7 @@ bool TasmotaSerial::begin(uint32_t speed, uint32_t config) {
         } else {
           TSerial = new HardwareSerial(m_uart);
         }
-#endif  // ARDUINO_USB_CDC_ON_BOOT
+#endif  // ARDUINO_USB_MODE
         if (serial_buffer_size > 256) {  // RX Buffer can't be resized when Serial is already running (HardwareSerial.cpp)
           TSerial->setRxBufferSize(serial_buffer_size);
         }
diff --git a/tasmota/tasmota_support/support.ino b/tasmota/tasmota_support/support.ino
index 1452a7fab..00ed4c2e0 100755
--- a/tasmota/tasmota_support/support.ino
+++ b/tasmota/tasmota_support/support.ino
@@ -2018,7 +2018,7 @@ void SetSerialBegin(void) {
   SetSerialSwap();
 #endif  // ESP8266
 #ifdef ESP32
-#ifdef ARDUINO_USB_CDC_ON_BOOT
+#if ARDUINO_USB_MODE
 //  Serial.end();
 //  Serial.begin();
   // Above sequence ends in "Exception":5,"Reason":"Load access fault"
@@ -2028,7 +2028,7 @@ void SetSerialBegin(void) {
   Serial.end();
   delay(10);  // Allow time to cleanup queues - if not used hangs ESP32
   Serial.begin(TasmotaGlobal.baudrate, ConvertSerialConfig(Settings->serial_config));
-#endif  // Not ARDUINO_USB_CDC_ON_BOOT
+#endif  // Not ARDUINO_USB_MODE
 #endif  // ESP32
 }