diff --git a/src/agenda_culturel/filters.py b/src/agenda_culturel/filters.py
index ade71c7..1927fc3 100644
--- a/src/agenda_culturel/filters.py
+++ b/src/agenda_culturel/filters.py
@@ -399,14 +399,12 @@ class SimpleSearchEventFilter(django_filters.FilterSet):
         widget=forms.CheckboxSelectMultiple,
     )
 
-    #past = django_filters.BooleanFilter(
-    #    label=_("In the past"),
-    #    method="in_past")
     past = django_filters.ChoiceFilter(
             label=_("In the past"),
             choices=[(False, _("No")), (True, _("Yes"))], 
             null_label=None,
             empty_label=None,
+            required=True,
             method="in_past",
             widget=forms.Select)