diff --git a/services/shifttool/current/app/src/agebd_shifttool/service.py b/services/shifttool/current/app/src/agebd_shifttool/service.py
index bbdf909..1f4b7ef 100644
--- a/services/shifttool/current/app/src/agebd_shifttool/service.py
+++ b/services/shifttool/current/app/src/agebd_shifttool/service.py
@@ -15,6 +15,7 @@ locale.setlocale(locale.LC_TIME, "de_CH.UTF-8")  # oder 'de_CH.UTF-8'
 
 __version__ = printgetversion(__file__)
 
+PV = get_pv_class()
 PV_EXTERNAL = get_pv_external_class()