diff --git a/snikket_web/admin.py b/snikket_web/admin.py
index de5f255..bf895eb 100644
--- a/snikket_web/admin.py
+++ b/snikket_web/admin.py
@@ -298,6 +298,7 @@ class InvitePost(BaseForm):
             ("prosody:registered", _l("Normal user")),
             ("prosody:admin", _l("Administrator")),
         ],
+        default="prosody:registered",
     )
 
     action_create_invite = wtforms.SubmitField(