diff --git a/aleksis/apps/alsijil/models.py b/aleksis/apps/alsijil/models.py
index 2bf3b78c3909ab9f5ca90e82f1e3f1d090231d07..4dd7ba00143dab7094cf8d17d82b8412f11fa322 100644
--- a/aleksis/apps/alsijil/models.py
+++ b/aleksis/apps/alsijil/models.py
@@ -585,7 +585,7 @@ class Documentation(CalendarEvent):
         """
         event_params = {
             "type": "PARTICIPANT",
-            "obj_id": person,
+            "id": person,
         }
 
         events = LessonEvent.get_single_events(