diff --git a/cubesatsim/cubesatsim.h b/cubesatsim/cubesatsim.h
index 7fb49093..d04fdfee 100644
--- a/cubesatsim/cubesatsim.h
+++ b/cubesatsim/cubesatsim.h
@@ -207,6 +207,8 @@ float latitude = 39.027702f, longitude = -77.078064f;
 float lat_file, long_file;
 double cpuTemp;
 int frameTime;
+bool i2c_bus1;
+bool i2c_bus2;
 
 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;