diff --git a/addons/account_anglo_saxon/purchase.py b/addons/account_anglo_saxon/purchase.py
index 362d5028a24..f9ab18ee818 100644
--- a/addons/account_anglo_saxon/purchase.py
+++ b/addons/account_anglo_saxon/purchase.py
@@ -28,7 +28,7 @@ class purchase_order(osv.osv):
 
     def inv_line_create(self, cr, uid, a, ol):
         line = super(purchase_order, self).inv_line_create(cr, uid, a, ol)
-        if ol.product_id:
+        if ol.product_id and not ol.product_id.type == 'service':
             oa = ol.product_id.property_stock_account_input and ol.product_id.property_stock_account_input.id
             if not oa:
                 oa = ol.product_id.categ_id.property_stock_account_input_categ and ol.product_id.categ_id.property_stock_account_input_categ.id