diff --git a/Controll.py b/Controll.py
index 4c6b080..40bdf14 100644
--- a/Controll.py
+++ b/Controll.py
@@ -9,7 +9,7 @@ def main():
     sess = pysmu.Session()
     sess.add_all()
 
-    controllers = {dev.serial: DeviceController(dev) for dev in sess.devices}
+    controllers = {dev.serial: DeviceController(sess, dev) for dev in sess.devices}
     serials = list(controllers.keys())
     print("Gefundene Geräte:", serials)