diff --git a/bahmni_stock_batch_sale_price/sale_order_line.py b/bahmni_stock_batch_sale_price/sale_order_line.py
index 05a851a..a3527c1 100755
--- a/bahmni_stock_batch_sale_price/sale_order_line.py
+++ b/bahmni_stock_batch_sale_price/sale_order_line.py
@@ -117,7 +117,7 @@ def product_id_change(self, cr, uid, ids, pricelist, product, qty=0,
                 sale_price = prodlot.sale_price
                 result['batch_name'] = prodlot.name
                 result['batch_id'] = prodlot.id
-                result['expiry_date'] = life_date.strftime('%d/%m/%Y') if (type(life_date) == 'datetime.datetime') else None
+                result['expiry_date'] = life_date.strftime('%d/%m/%Y') if (type(life_date) == datetime) else None
                 break
         #-----------------------------------------------------------------