diff --git a/addons/purchase/purchase.py b/addons/purchase/purchase.py
index a27dfce1985..25bf5217461 100644
--- a/addons/purchase/purchase.py
+++ b/addons/purchase/purchase.py
@@ -1271,6 +1271,17 @@ class product_template(osv.Model):
     _name = 'product.template'
     _inherit = 'product.template'
     
+    _columns = {
+        'purchase_ok': fields.boolean('Can be Purchased', help="Specify if the product can be selected in a purchase order line."),
+    }
+    _defaults = {
+        'purchase_ok': 1,
+    }
+
+class product_product(osv.Model):
+    _name = 'product.product'
+    _inherit = 'product.product'
+    
     def _purchase_count(self, cr, uid, ids, field_name, arg, context=None):
         res = dict(map(lambda x: (x,0), ids))
         try:
@@ -1280,13 +1291,10 @@ class product_template(osv.Model):
             pass
         return res
     _columns = {
-        'purchase_ok': fields.boolean('Can be Purchased', help="Specify if the product can be selected in a purchase order line."),
         'purchase_ids': fields.one2many('purchase.order', 'product_id', 'Purchases'),
         'purchase_count': fields.function(_purchase_count, string='# Purchases', type='integer'),
     }
-    _defaults = {
-        'purchase_ok': 1,
-    }
+
 
 
 class mail_compose_message(osv.Model):