diff --git a/aleksis/apps/alsijil/model_extensions.py b/aleksis/apps/alsijil/model_extensions.py
index 5ee293aa1874f146b12087c6f97b2796437de240..a0f6378307f82bca2ee0e87fe33b61cee8fe67b3 100644
--- a/aleksis/apps/alsijil/model_extensions.py
+++ b/aleksis/apps/alsijil/model_extensions.py
@@ -102,7 +102,7 @@ def annotate_person_statistics_for_school_term(
         datetime_end__date__lte=school_term.date_end,
     )
     if group:
-        documentations.filter(
+        documentations = documentations.filter(
             pk__in=Documentation.objects.filter(course__groups=group).union(
                 Documentation.objects.filter(course__groups__parent_groups=group)
             )