diff --git a/src/alpine_bits_python/alpine_bits_helpers.py b/src/alpine_bits_python/alpine_bits_helpers.py
index d5aa2ef..dc3087e 100644
--- a/src/alpine_bits_python/alpine_bits_helpers.py
+++ b/src/alpine_bits_python/alpine_bits_helpers.py
@@ -797,7 +797,7 @@ def create_xml_from_db(list: list[Tuple[Reservation, Customer]]):
     )
 
     ota_res_retrieve_rs = OtaResRetrieveRs(
-        version="7.000", success=None, reservations_list=retrieved_reservations
+        version="7.000", success="", reservations_list=retrieved_reservations
     )
 
     try: