diff --git a/gestioncof/forms.py b/gestioncof/forms.py
index e7672c8f..62e47c0e 100644
--- a/gestioncof/forms.py
+++ b/gestioncof/forms.py
@@ -385,7 +385,8 @@ class CalendarForm(forms.ModelForm):
     other_shows = forms.ModelMultipleChoiceField(
             label="Spectacles supplémentaires.",
             queryset=Spectacle.objects.filter(tirage__active=True),
-            widget=forms.CheckboxSelectMultiple)
+            widget=forms.CheckboxSelectMultiple,
+            required=False)
 
     class Meta:
         model = CalendarSubscription