diff --git a/cubesatsim/cubesatsim.ino b/cubesatsim/cubesatsim.ino
index 115a8165..064c6e33 100644
--- a/cubesatsim/cubesatsim.ino
+++ b/cubesatsim/cubesatsim.ino
@@ -3672,7 +3672,7 @@ void start_button_isr() {
   Serial.println("Starting pushbutton ISR");
 	
 //  if (ITimer1.attachInterruptInterval(10000, TimerHandler1))
-  if (ITimer1.attachInterruptInterval(10000, TimerHandler2))	
+  if (ITimer2.attachInterruptInterval(10000, TimerHandler1))	
   {
     if (debug_mode)	  
       Serial.print(F("Starting ITimer1 OK, micros() = "));