diff --git a/aleksis/apps/alsijil/views.py b/aleksis/apps/alsijil/views.py
index b2378f891f579b328c9c51114a7d212adba5d1ec..255c4486decd43e8b13047ab538d050376bb3be3 100644
--- a/aleksis/apps/alsijil/views.py
+++ b/aleksis/apps/alsijil/views.py
@@ -291,7 +291,7 @@ def week_view(
 
         lesson_periods = lesson_periods.filter_from_type(type_, instance)
         events = events.filter_from_type(type_, instance)
-        extra_lessons = extra_lessons.filter_from_Type(type_, instance)
+        extra_lessons = extra_lessons.filter_from_type(type_, instance)
 
     elif hasattr(request, "user") and hasattr(request.user, "person"):
         if request.user.person.lessons_as_teacher.exists():