diff --git a/include/uart/soft_uart.h b/include/uart/soft_uart.h
index 9093bf0..0368347 100644
--- a/include/uart/soft_uart.h
+++ b/include/uart/soft_uart.h
@@ -14,7 +14,7 @@
  * uart name.
  **/
 #define CREATE_FAST_UART(uartname,port,pinname,bitnum,TX_BLOCKING,RX_ENABLED)   \
-unsigned char uartname##_load_delay;                                            \
+BYTE uartname##_load_delay;                                                     \
 enum uart_baud uartname##rate;                                                  \
 BOOL uartname##_init(enum uart_baud rate,...)                                   \
 {                                                                               \