diff --git a/cubesatsim/cubesatsim.h b/cubesatsim/cubesatsim.h
index 746b237d..52635916 100644
--- a/cubesatsim/cubesatsim.h
+++ b/cubesatsim/cubesatsim.h
@@ -372,6 +372,7 @@ RPI_PICO_Timer ITimer1(1);
 RPI_PICO_Timer ITimer2(2);
 
 bool timer0_on = false;
+bool timer2_on = false;
 
 char callsign[20];
 int morse_timing = 60;  // ms for a dit