diff --git a/SoObjects/SOGo/SOGoFolder.h b/SoObjects/SOGo/SOGoFolder.h
index 24de0805b..cc97cf153 100644
--- a/SoObjects/SOGo/SOGoFolder.h
+++ b/SoObjects/SOGo/SOGoFolder.h
@@ -41,6 +41,9 @@
 
 - (NSString *) folderType;
 
+- (NSArray *) toOneRelationshipKeys;
+- (NSArray *) toManyRelationshipKeys;
+
 - (BOOL) isValidContentName: (NSString *) name;
 
 /* sorting */
diff --git a/SoObjects/SOGo/SOGoGCSFolder.h b/SoObjects/SOGo/SOGoGCSFolder.h
index 76ee7185c..6c8022786 100644
--- a/SoObjects/SOGo/SOGoGCSFolder.h
+++ b/SoObjects/SOGo/SOGoGCSFolder.h
@@ -116,6 +116,8 @@
 - (NSDictionary *) davSQLFieldsTable;
 - (NSDictionary *) parseDAVRequestedProperties: (DOMElement *) propElement;
 
+- (NSString *) davCollectionTag;
+
 @end
 
 #endif /* __SOGo_SOGoGCSFolder_H__ */