diff --git a/tools/sim/bridge.py b/tools/sim/bridge.py
index fc58fbe35d..6817375451 100755
--- a/tools/sim/bridge.py
+++ b/tools/sim/bridge.py
@@ -368,9 +368,10 @@ if __name__ == "__main__":
   # make sure params are in a good state
   set_params_enabled()
 
-  params = Params()
-  params.delete("Offroad_ConnectivityNeeded")
-  params.put("CalibrationParams", '{"calib_radians": [0,0,0], "valid_blocks": 20}')
+  msg = messaging.new_message('liveCalibration')
+  msg.liveCalibration.validBlocks = 20
+  msg.liveCalibration.rpyCalib = [0.0, 0.0, 0.0]
+  Params().put("CalibrationParams", msg.to_bytes())
 
   from multiprocessing import Process, Queue
   q: Any = Queue()