diff --git a/platform/avr-ravenusb/contiki-conf.h b/platform/avr-ravenusb/contiki-conf.h
index 63f6ec525..bc773368b 100644
--- a/platform/avr-ravenusb/contiki-conf.h
+++ b/platform/avr-ravenusb/contiki-conf.h
@@ -185,7 +185,7 @@ extern void mac_log_802_15_4_rx(const uint8_t* buffer, size_t total_len);
  * The tx pad is the middle one behind the jackdaw leds.
  * RS232 output will work with or without enabling the USB serial port
  */
-#define USB_CONF_RS232           0
+#define USB_CONF_RS232           1
 
 /* Disable mass storage enumeration for more program space */
 //#define USB_CONF_STORAGE         1   /* TODO: Mass storage is currently broken */