diff --git a/src/pretalx/api/serializers/speaker.py b/src/pretalx/api/serializers/speaker.py
index 1e9ae78b3..b6380f4ac 100644
--- a/src/pretalx/api/serializers/speaker.py
+++ b/src/pretalx/api/serializers/speaker.py
@@ -62,12 +62,12 @@ def get_avatar(obj):
     @staticmethod
     def get_avatar_source(obj):
         if obj.user.has_avatar and obj.user.avatar_source != '':
-            return obj.user.avatar_source(event=obj.event)
+            return obj.user.avatar_source
 
     @staticmethod
     def get_avatar_license(obj):
         if obj.user.has_avatar and obj.user.avatar_license != '':
-            return obj.user.avatar_license(event=obj.event)
+            return obj.user.avatar_license
 
     @staticmethod
     def get_submissions(obj):