diff --git a/aleksis/apps/chronos/models.py b/aleksis/apps/chronos/models.py
index 26c86557c6562e85e8aaba62421f296769fac2e1..ed70d6586eab5664c9dedda286cd66532823b46d 100644
--- a/aleksis/apps/chronos/models.py
+++ b/aleksis/apps/chronos/models.py
@@ -1540,6 +1540,7 @@ class LessonEvent(CalendarEvent):
         real_amends = reference_object.real_amends
 
         return {
+            "id": reference_object.id,
             "amended": bool(reference_object.amends),
             "amends": cls.value_meta(real_amends, request) if reference_object.amends else None,
             "teachers": [