diff --git a/cubesatsim/cubesatsim.h b/cubesatsim/cubesatsim.h
index 3f6848af..a5a9f8ef 100644
--- a/cubesatsim/cubesatsim.h
+++ b/cubesatsim/cubesatsim.h
@@ -252,8 +252,9 @@ int pwm_counter = 0;
 int pwm_counter_max = 420;
 int pwm_amplitude = 50; //50 //100;
 int pwm_value;
-int pwm_rnd_bit = 1;
+int tx_bit = 1;
 float delay_ms_time;
+bool  polarity = true;
 
 int ready = FALSE;