diff --git a/openedx/core/djangoapps/bookmarks/serializers.py b/openedx/core/djangoapps/bookmarks/serializers.py
index 37148cc6f2e4..67ca301b675a 100644
--- a/openedx/core/djangoapps/bookmarks/serializers.py
+++ b/openedx/core/djangoapps/bookmarks/serializers.py
@@ -51,7 +51,7 @@ def __init__(self, *args, **kwargs):
         # Drop any fields that are not specified in the `fields` argument.
         required_fields = set(fields)
 
-        if 'request' in kwargs['context'] and is_schema_request(kwargs['context']['request']):
+        if 'context' in kwargs and 'request' in kwargs['context'] and is_schema_request(kwargs['context']['request']):
             # We are serving the schema: include everything
             required_fields.update(OPTIONAL_FIELDS)