diff --git a/fet2020/members/models.py b/fet2020/members/models.py
index 45b90fcb..50da58b4 100644
--- a/fet2020/members/models.py
+++ b/fet2020/members/models.py
@@ -89,7 +89,7 @@ class Member(models.Model):
     firstname = models.CharField("Vorname", max_length=128)
     surname = models.CharField("Nachname", max_length=128)
     nickname = models.CharField("Spitzname",  max_length=128)
-    username = models.CharField("Benutzername", null=True, blank=True, max_length=128)
+    username = models.CharField("Benutzername", blank=True, max_length=128)
     mailaccount = models.CharField("Mailadresse", unique=True, max_length=128)
 
     class MemberRole(models.TextChoices):