diff --git a/purchase_packaging/__init__.py b/purchase_packaging/__init__.py
index cde864bae..e09445c76 100755
--- a/purchase_packaging/__init__.py
+++ b/purchase_packaging/__init__.py
@@ -1,3 +1,8 @@
 # -*- coding: utf-8 -*-
 
 from . import models
+
+
+def set_product_purchase_qty(cr, registry):
+    cr.execute("""update purchase_order_line
+                  set product_purchase_qty = product_qty""")
diff --git a/purchase_packaging/__openerp__.py b/purchase_packaging/__openerp__.py
index 093fe13e4..732f2b0fd 100755
--- a/purchase_packaging/__openerp__.py
+++ b/purchase_packaging/__openerp__.py
@@ -33,6 +33,7 @@
     "data": ["views/product_views.xml",
              "views/purchase_views.xml",
              ],
+    "post_init_hook": "set_product_purchase_qty",
     "license": "AGPL-3",
     "installable": True,
     "application": False,