diff --git a/biscuit/apps/alsijil/views.py b/biscuit/apps/alsijil/views.py
index 631a7849030d3bed789a402ecb654abad6b129a3..de9b3af1b102a7219bcced7f714130e489725d47 100644
--- a/biscuit/apps/alsijil/views.py
+++ b/biscuit/apps/alsijil/views.py
@@ -115,7 +115,7 @@ def group_week(request: HttpRequest, week: Optional[int] = None) -> HttpResponse
         ).extra(
             select={'_week': wanted_week}
         ).filter(
-            Q(lesson__groups=group) | Q(lesson__groups__parent_groups=group')
+            Q(lesson__groups=group) | Q(lesson__groups__parent_groups=group)
         )
 
         # Aggregate all personal notes for this group and week