diff --git a/rq_hardware/thd_roboct/thd_roboct_service.py b/rq_hardware/thd_roboct/thd_roboct_service.py
index 744cb27ce2f96b9d5a25380039ca47d29efa50ab..9e217d6ce9e6bd73fc7a4925c8d979ecfb868595 100644
--- a/rq_hardware/thd_roboct/thd_roboct_service.py
+++ b/rq_hardware/thd_roboct/thd_roboct_service.py
@@ -36,6 +36,8 @@ except ModuleNotFoundError:
     import warnings
     warnings.warn("Packages are spedific for the RoboCT of the Deggendorf Institute of Technology. \n" + 
                   "Please Contact: simon.wittl@th-deg.de")
+    class Event:
+        pass
 
 
 class TurntablePlannerParameter: