diff --git a/platformio.ini b/platformio.ini
index ecdb65ce..90dcf48f 100644
--- a/platformio.ini
+++ b/platformio.ini
@@ -2502,11 +2502,12 @@ upload_speed = 460800
 build_unflags = ${env:esp32c3dev_4MB_M.build_unflags}
   -DWLEDMM_FASTPATH ;; needs more testing on -C3
   -D WLED_ENABLE_HUB75MATRIX ;; not enough pins
+  -DARDUINO_USB_CDC_ON_BOOT=1 ;; hangs on boot
 build_flags = ${common.build_flags} ${esp32c3.build_flags} 
   -D WLED_WATCHDOG_TIMEOUT=0 -D CONFIG_ASYNC_TCP_USE_WDT=0
   ${common_mm.build_flags_S} -Wno-misleading-indentation -Wno-format-truncation
   -D WLED_RELEASE_NAME=seeed_esp32c3_4MB_S
-  -DARDUINO_USB_CDC_ON_BOOT=1  ;; enable CDC USB -> needed for debugging over serial USB
+  -DARDUINO_USB_CDC_ON_BOOT=0  ;; disable CDC USB, as the older framework has problems with it
   -D WLED_DISABLE_ADALIGHT     ;; to disable serial protocols when using CDC USB (Serial RX pin will receive junk commands, unless its pulled down by resistor)
   -D WLED_DISABLE_INFRARED  ;; save flash space
   ;-D WLED_DISABLE_ALEXA    ;; save flash space