diff --git a/src/design/plone/ioprenoto/restapi/services/bookable_list/get.py b/src/design/plone/ioprenoto/restapi/services/bookable_list/get.py
index 285bf89..959389a 100644
--- a/src/design/plone/ioprenoto/restapi/services/bookable_list/get.py
+++ b/src/design/plone/ioprenoto/restapi/services/bookable_list/get.py
@@ -164,7 +164,7 @@ def reply(self):
     def get_uo_contact_info(self, uo):
         result = []
 
-        for contact in getattr(uo, "contact_info", []):
+        for contact in getattr(uo, "contact_info", None) || []:
             if contact.isBroken():
                 logger.error(
                     "Broken relation found in <{UID}>.contact_info".format(UID=uo.UID())