diff --git a/xero/utils.py b/xero/utils.py
index <HASH>..<HASH> 100644
--- a/xero/utils.py
+++ b/xero/utils.py
@@ -43,6 +43,7 @@ OBJECT_NAMES = {
     "Reports": "Report",
     "TaxRates": "TaxRate",
     "TrackingCategories": "TrackingCategory",
+    "Tracking": "TrackingCategory",
     "Users": "User",
     "Associations": "Association",
     "Files": "File",
Add 'Tracking' as a plural of 'TrackingCategory'

This feels a bit uncomfortable, but effectively; the Xero API is inconsistent about using 'TrackingCategories' as the key for elements where it expects the sub-elements to be 'TrackingCategory'. Specifically, for LineItems, it uses the term 'Tracking' instead, as per <URL>