diff --git a/main.c b/main.c
index f0269d9..3f0d217 100644
--- a/main.c
+++ b/main.c
@@ -26,8 +26,7 @@ void start_timer() {
 // is triggered whenever timer 1 (16 bit) overflows.
 ISR(TIMER1_OVF_vect) {
     TCNT1 = tick_timer_start;
-    if (PORTB & 0b10000000) PORTB &= 0b01111111;
-    else PORTB |= 0b10000000;
+    PORTB ^= 0b10000000;
 }
 
 void main() {