diff --git a/openslides/assignment/forms.py b/openslides/assignment/forms.py
index b771a41b4..b04a23a6d 100644
--- a/openslides/assignment/forms.py
+++ b/openslides/assignment/forms.py
@@ -20,7 +20,7 @@ from openslides.assignment.models import Assignment
 
 
 class AssignmentForm(forms.ModelForm, CssClassMixin):
-    posts = forms.IntegerField(min_value=1,
+    posts = forms.IntegerField(min_value=1, initial=1,
         label=_("Number of available posts"))
 
     class Meta: