diff --git a/lib/xeroizer/models/line_item.rb b/lib/xeroizer/models/line_item.rb
index 4cc686ac..fc5d2cf2 100644
--- a/lib/xeroizer/models/line_item.rb
+++ b/lib/xeroizer/models/line_item.rb
@@ -20,7 +20,7 @@ class LineItem < Base
       decimal :line_amount, :calculated => true
       decimal :discount_rate
       decimal :discount_amount
-      guid  :line_item_id
+      guid  :line_item_id, :api_name => 'LineItemID'
 
       has_many  :tracking, :model_name => 'TrackingCategoryChild'