diff --git a/sw/airborne/fly_by_wire/uart.c b/sw/airborne/fly_by_wire/uart.c
index 12450d2f41..28af578711 100644
--- a/sw/airborne/fly_by_wire/uart.c
+++ b/sw/airborne/fly_by_wire/uart.c
@@ -30,7 +30,7 @@
 #include "std.h"
 #include "uart.h"
 
-#define TX_BUF_SIZE      256
+//#define TX_BUF_SIZE      256
 static uint8_t           tx_head; /* next free in buf */
 static volatile uint8_t  tx_tail; /* next char to send */
 static uint8_t           tx_buf[ TX_BUF_SIZE ];