diff --git a/Timer.cpp b/Timer.cpp
index 3a73401..1430e9c 100644
--- a/Timer.cpp
+++ b/Timer.cpp
@@ -85,15 +85,10 @@ ISR(TIMER2_OVF_vect)
 
 #include "ATMEGA4809/Timer.h"
 
-Timer TimerA(1);
-Timer TimerB(2);
+Timer TimerA(0);
 
-ISR(TIMER1_OVF_vect) {
+ISR(TCA0_OVF_vect) {
     TimerA.isrCallback();
 }
 
-ISR(TIMER2_OVF_vect) {
-    TimerB.isrCallback();
-}
-
 #endif