diff --git a/flaschengeist/plugins/auth_plain/__init__.py b/flaschengeist/plugins/auth_plain/__init__.py
index 49575e5..ce9d006 100644
--- a/flaschengeist/plugins/auth_plain/__init__.py
+++ b/flaschengeist/plugins/auth_plain/__init__.py
@@ -6,7 +6,7 @@ Flaschengeist database (as User attribute)
 import os
 import hashlib
 import binascii
-from werkzeug.exceptions import BadRequest
+from werkzeug.exceptions import BadRequest, NotFound
 
 from flaschengeist.plugins import AuthPlugin
 from flaschengeist.models.user import User
@@ -33,6 +33,14 @@ class AuthPlain(AuthPlugin):
     def delete_user(self, user):
         pass
 
+    def get_avatar(self, user):
+        if not user.has_attribute("avatar"):
+            raise NotFound
+        return user.get_attribute("avatar")
+
+    def set_avatar(self, user, avatar):
+        user.set_attribute("avatar", avatar)
+
     @staticmethod
     def _hash_password(password):
         salt = hashlib.sha256(os.urandom(60)).hexdigest().encode("ascii")