diff --git a/boards/dfrobot_romeo_esp32s3.json b/boards/dfrobot_romeo_esp32s3.json
index 55e69db5c..655ddd18b 100644
--- a/boards/dfrobot_romeo_esp32s3.json
+++ b/boards/dfrobot_romeo_esp32s3.json
@@ -10,7 +10,8 @@
       "-DARDUINO_DFROBOT_ROMEO_ESP32S3",
       "-DARDUINO_USB_MODE=1",
       "-DARDUINO_RUNNING_CORE=1",
-      "-DARDUINO_EVENT_RUNNING_CORE=1"
+      "-DARDUINO_EVENT_RUNNING_CORE=1",
+      "-DARDUINO_USB_CDC_ON_BOOT=1"
     ],
     "f_cpu": "240000000L",
     "f_flash": "80000000L",