diff --git a/main.h b/main.h
index 7e7a8507..2f5b3fe6 100644
--- a/main.h
+++ b/main.h
@@ -149,6 +149,7 @@ long int newGpsTime;
 
 float axis[3], angle[3], volts_max[3], amps_max[3], batt, speed, period, tempS, temp_max, temp_min, eclipse;
 int i2c_bus0 = OFF, i2c_bus1 = OFF, i2c_bus3 = OFF, camera = OFF, sim_mode = FALSE, SafeMode = FALSE, rxAntennaDeployed = 0, txAntennaDeployed = 0;
+int sim_config = FALSE; // sim mode not set by configuration
 double eclipse_time;
 
 float voltage[9], current[9], sensor[SENSOR_FIELDS], other[3];