diff --git a/position/traffic-control/tcontrol_car.py b/position/traffic-control/tcontrol_car.py
index 64cfdf96..8f0b2e8b 100644
--- a/position/traffic-control/tcontrol_car.py
+++ b/position/traffic-control/tcontrol_car.py
@@ -24,6 +24,8 @@ def __init__(self):
 
         self.objs = []
 
+        self.conn = None
+
         self.x = None
         self.y = None
         self.ang = None