diff --git a/port/avr/avr.c b/port/avr/avr.c
index c4f0229..d8c1203 100644
--- a/port/avr/avr.c
+++ b/port/avr/avr.c
@@ -18,10 +18,10 @@ static void Init(void) {
   _delay_ms(10);
 
   /* reset */
-  DATA_PORT |= _BV(WR) | _BV(FL);
-  DATA_PORT &= ~_BV(RST);
+  DATA_PORT |= WR | FL;
+  DATA_PORT &= ~RST;
   _delay_us(1);
-  DATA_PORT |= _BV(RST);
+  DATA_PORT |= RST;
 
   _delay_ms(1);