diff --git a/examples/MultiDevice/platformio.ini b/examples/MultiDevice/platformio.ini
index ac7543c..5ca7b1b 100644
--- a/examples/MultiDevice/platformio.ini
+++ b/examples/MultiDevice/platformio.ini
@@ -28,6 +28,8 @@ framework = arduino
 monitor_speed = 115200
 monitor_filters = esp32_exception_decoder
 build_flags =
+    -D ARDUINO_USB_MODE=1
+    -D ARDUINO_USB_CDC_ON_BOOT=1
 #    -DCORE_DEBUG_LEVEL=3
 
 [env:esp32-s3-debug]