diff --git a/dav_events/forms/events.py b/dav_events/forms/events.py
index 19eda05..ceee8bb 100644
--- a/dav_events/forms/events.py
+++ b/dav_events/forms/events.py
@@ -612,11 +612,9 @@ class RegistrationForm(EventCreateForm):
     _form_title = _(u'Teilnehmer / Anmeldung')
     _next_form_name = 'ChargesForm'
 
-    min_participants = forms.IntegerField(initial=0,
-                                          min_value=0,
+    min_participants = forms.IntegerField(min_value=0,
                                           label=_(u'Min. Teilnehmer'))
-    max_participants = forms.IntegerField(initial=0,
-                                          min_value=0,
+    max_participants = forms.IntegerField(min_value=0,
                                           label=_(u'Max. Teilnehmer'))
 
     deadline = forms.ChoiceField(choices=choices.DEADLINE_CHOICES,