diff --git a/src/pulses_avr.cpp b/src/pulses_avr.cpp
index f541d9f3b..8cbda4eb9 100644
--- a/src/pulses_avr.cpp
+++ b/src/pulses_avr.cpp
@@ -94,10 +94,11 @@ uint8_t *pulses2MHzWPtr = pulses2MHz;
 #define CTRL_REP_1CMD -3
 #define CTRL_REP_2CMD -6
 
+uint8_t g_ppmPulsePolarity = 0;
+
 #ifndef SIMU
 
 // TIMER1_COMPA_vect used for PPM and DSM2=SERIAL
-uint8_t g_ppmPulsePolarity = 0;
 ISR(TIMER1_COMPA_vect) //2MHz pulse generation (BLOCKING ISR)
 {
   uint8_t dt = TCNT1L; // record Timer1 latency for DEBUG stats display