diff --git a/addons/mrp/mrp.py b/addons/mrp/mrp.py
index bc5b7608eec..83794c2c4ba 100644
--- a/addons/mrp/mrp.py
+++ b/addons/mrp/mrp.py
@@ -321,7 +321,7 @@ class mrp_bom(osv.osv):
                 raise osv.except_osv(_('Invalid Action!'), _('BoM "%s" contains a BoM line with a product recursion: "%s".') % (master_bom.name,bom_line_id.product_id.name_get()[0][1]))
             all_prod.append(bom_line_id.product_id.id)
 
-
+            quantity = _factor(bom_line_id.product_qty * factor, bom_line_id.product_efficiency, bom_line_id.product_rounding)
             bom_id = self._bom_find(cr, uid, bom_line_id.product_uom.id, product_id=bom_line_id.product_id.id, properties=properties, context=context)
 
             #If BoM should not behave like PhantoM, just add the product, otherwise explode further
@@ -329,14 +329,13 @@ class mrp_bom(osv.osv):
                 result.append({
                     'name': bom_line_id.product_id.name,
                     'product_id': bom_line_id.product_id.id,
-                    'product_qty': bom_line_id.product_qty * factor,
+                    'product_qty': quantity,
                     'product_uom': bom_line_id.product_uom.id,
                     'product_uos_qty': bom_line_id.product_uos and bom_line_id.product_uos_qty * factor or False,
                     'product_uos': bom_line_id.product_uos and bom_line_id.product_uos.id or False,
                 })
             elif bom_id:
                 bom2 = self.browse(cr, uid, bom_id, context=context)
-                quantity = _factor(bom_line_id.product_qty * factor, bom_line_id.product_efficiency, bom_line_id.product_rounding)
                 res = self._bom_explode(cr, uid, bom2, bom_line_id.product_id, quantity,
                     properties=properties, level=level + 10, previous_products=all_prod, master_bom=master_bom, context=context)
                 result = result + res[0]