diff --git a/tailbone/views/shifts/schedule.py b/tailbone/views/shifts/schedule.py
index 26bb65cd..2509053f 100644
--- a/tailbone/views/shifts/schedule.py
+++ b/tailbone/views/shifts/schedule.py
@@ -84,9 +84,9 @@ class ScheduleView(TimeSheetView):
             deleted = []
             for uuid, value in data['delete'].iteritems():
                 if value == 'delete':
-                    shift = self.Session.query(model.ScheduledShift).get(uuid)
+                    shift = Session.query(model.ScheduledShift).get(uuid)
                     if shift:
-                        self.Session.delete(shift)
+                        Session.delete(shift)
                         deleted.append(uuid)
 
             # apply create / update operations