diff --git a/README.rst b/README.rst
index 8c2b5b3..97b5c46 100644
--- a/README.rst
+++ b/README.rst
@@ -20,7 +20,7 @@ Information is sent every eight hours or on manual sync, and is mapped as follow
     - Status__c is set to the submission’s status.
     - Abstract__c is set to the submission’s abstract plus the submission’s description, separated by two newlines and then stripped of whitespace.
     - Pretalx_Record__c is set to the submission’s public URL.
-- The mapping between Contacts and Sessions is synced to the custom ContactSession object:
+- The mapping between Contacts and Sessions is synced to the custom Contact_Session object:
     - Contact__c is set to the Salesforce Contact.
     - Session__c is set to the Salesforce Session.
 
diff --git a/pretalx_salesforce/models.py b/pretalx_salesforce/models.py
index 9deae57..c8a6ae0 100644
--- a/pretalx_salesforce/models.py
+++ b/pretalx_salesforce/models.py
@@ -223,7 +223,7 @@ def sync_relations(self, sf=None, force=False):
                 # This is a known relation, and it holds no data of its own, so we don’t
                 # need to update it
                 continue
-            result = sf.ContactSession__c.create(relation)
+            result = sf.Contact_Session.create(relation)
             speaker_id = relation["Contact__c"]["pretalx_LegacyID__c"]
             self.synced_data["relation_mapping"][speaker_id] = result["id"]
 
diff --git a/pretalx_salesforce/sync.py b/pretalx_salesforce/sync.py
index f76c767..7cbb92a 100644
--- a/pretalx_salesforce/sync.py
+++ b/pretalx_salesforce/sync.py
@@ -19,7 +19,7 @@
 def sync_event_with_salesforce(event):
     """
     Syncs an event with Salesforce. The sync maps objects as follows, and requires
-    the custom ContactSession and Session objects to be created in Salesforce:
+    the custom Contact_Session and Session objects to be created in Salesforce:
 
     - User/SpeakerProfile -> Contact, setting
         - Contact.pretalx_LegacyID__c = User.code
@@ -29,7 +29,7 @@ def sync_event_with_salesforce(event):
         - Contact.Biography__c = User.event_profile.biography
         - Contact.Profile_Picture__c = User.avatar.url
 
-    - [nothing] -> ContactSession
+    - [nothing] -> Contact_Session
         - ID
         - Session__c = Session
         - Contact__c = Contact