diff --git a/Controll.py b/Controll.py
index 32ef0e3..8c96c7e 100644
--- a/Controll.py
+++ b/Controll.py
@@ -7,7 +7,7 @@ import os
 # --- Setup ---
 sess = pysmu.Session()
 sess.add_all()
-controllers = {dev.m_serial: DeviceController(dev) for dev in sess.m_devices}
+controllers = {dev.m_serial: DeviceController(dev) for dev in sess.devices}
 serials = list(controllers.keys())
 
 for i in enumerate(serials):