diff --git a/addons/purchase/purchase.py b/addons/purchase/purchase.py
index 30a416638f9..bdc00789d20 100644
--- a/addons/purchase/purchase.py
+++ b/addons/purchase/purchase.py
@@ -974,12 +974,10 @@ class purchase_order_line(osv.osv):
         return super(purchase_order_line, self).copy_data(cr, uid, id, default, context)
 
     def unlink(self, cr, uid, ids, context=None):
-        procurement_ids_to_cancel = []
-        for line in self.browse(cr, uid, ids, context=context):
-            if line.move_dest_id:
-                procurement_ids_to_cancel.extend(procurement.id for procurement in line.move_dest_id.procurements)
+        procurement_obj = self.pool.get('procurement.order')
+        procurement_ids_to_cancel = procurement_obj.search(cr, uid, [('purchase_line_id', 'in', ids)], context=context)
         if procurement_ids_to_cancel:
-            self.pool['procurement.order'].action_cancel(cr, uid, procurement_ids_to_cancel)
+            self.pool['procurement.order'].cancel(cr, uid, procurement_ids_to_cancel)
         return super(purchase_order_line, self).unlink(cr, uid, ids, context=context)
 
     def onchange_product_uom(self, cr, uid, ids, pricelist_id, product_id, qty, uom_id,
diff --git a/addons/purchase/test/process/run_scheduler.yml b/addons/purchase/test/process/run_scheduler.yml
index 11c02854ea5..d4c1da13cd7 100644
--- a/addons/purchase/test/process/run_scheduler.yml
+++ b/addons/purchase/test/process/run_scheduler.yml
@@ -37,8 +37,6 @@
 -
   !python {model: procurement.order}: |
     procurement = self.browse(cr, uid, ref('procurement_order_testcase0'))
-    move = procurement.purchase_id.order_line[0].move_dest_id
-    procurement.purchase_id.order_line[0].unlink()
-    assert move.state == 'cancel', 'Move should be cancelled'
+    procurement.purchase_line_id.unlink()
     procurement.refresh()
     assert procurement.state == 'cancel', 'Procurement should be cancelled'