diff --git a/cubesatsim/cubesatsim.ino b/cubesatsim/cubesatsim.ino
index 682dc5c9..88cc0d50 100644
--- a/cubesatsim/cubesatsim.ino
+++ b/cubesatsim/cubesatsim.ino
@@ -2116,8 +2116,8 @@ void config_radio()
 //    start_isr();	
     clockgen.setClockBPSK();
 	  
-    RPI_PICO_ISR_Timer::disable(timer2_number);	  
-    RPI_PICO_ISR_Timer::enable(timer0_number);	  
+    RPI_PICO_ISR_Timer::disable(*timer2_number);	  
+    RPI_PICO_ISR_Timer::enable(*timer0_number);	  
 	  
     transmit_on();	
   }
@@ -2126,8 +2126,8 @@ void config_radio()
 //    start_isr();   
     clockgen.setClockFSK(); 
 	
-    RPI_PICO_ISR_Timer::disable(timer0_number);	  
-    RPI_PICO_ISR_Timer::enable(timer2_number);	  
+    RPI_PICO_ISR_Timer::disable(*timer0_number);	  
+    RPI_PICO_ISR_Timer::enable(*timer2_number);	  
 
     transmit_on();
 }