diff --git a/avr/modules/flash/io_uart_all_attn.asm b/avr/modules/flash/io_uart_all_attn.asm
index c503229..740f3bc 100644
--- a/avr/modules/flash/io_uart_all_attn.asm
+++ b/avr/modules/flash/io_uart_all_attn.asm
@@ -37,8 +37,13 @@ ioRawInit:
   M_IO_WRITE UART_REG_UBRRL, r16
 
   ; set character format (asynchronous USART, 8-bit, one stop bit, no parity)
-  ldi r16, (1<<UART_BIT_UCSZ0) | (1<<UART_BIT_UCSZ1)
-  sts UART_REG_UCSRC, r16
+.ifdef URSEL
+  ldi r16, (1<<URSEL) | (1<<UART_BIT_USBS) | (3<<UART_BIT_UCSZ0)
+.else
+  ldi r16, (1<<UART_BIT_USBS)|(3<<UART_BIT_UCSZ0)
+.endif
+;  ldi r16, (1<<UART_BIT_UCSZ0) | (1<<UART_BIT_UCSZ1)
+  M_IO_WRITE UART_REG_UCSRC, r16
 
   cbi COM_ATTN_DDR, COM_ATTN_PIN          ; set ATTN port as input