diff --git a/addons/mrp/i18n/mrp.pot b/addons/mrp/i18n/mrp.pot
index d79fdaeb329..f5d87479f26 100644
--- a/addons/mrp/i18n/mrp.pot
+++ b/addons/mrp/i18n/mrp.pot
@@ -3266,6 +3266,18 @@ msgstr ""
 msgid "You cannot use the same serial number in two different lines."
 msgstr ""
 
+#. module: mrp
+#: code:addons/mrp/models/mrp_unbuild.py:110
+#, python-format
+msgid "You don't have in the stock the lot %s."
+msgstr ""
+
+#. module: mrp
+#: code:addons/mrp/models/mrp_unbuild.py:125
+#, python-format
+msgid "You don't have in the stock the required lot/serial number for %s ."
+msgstr ""
+
 #. module: mrp
 #: code:addons/mrp/wizard/change_production_qty.py:44
 #, python-format
diff --git a/addons/mrp/models/mrp_unbuild.py b/addons/mrp/models/mrp_unbuild.py
index dc22a8e87f1..d73466ed2bb 100644
--- a/addons/mrp/models/mrp_unbuild.py
+++ b/addons/mrp/models/mrp_unbuild.py
@@ -106,6 +106,8 @@ class MrpUnbuild(models.Model):
         self.env['stock.quant'].quants_reserve(quants, consume_move)
 
         if consume_move.has_tracking != 'none':
+            if not quants[0][0]:
+                raise UserError(_("You don't have in the stock the lot %s.") % (self.lot_id.name,))
             self.env['stock.move.lots'].create({
                 'move_id': consume_move.id,
                 'lot_id': self.lot_id.id,
@@ -119,6 +121,8 @@ class MrpUnbuild(models.Model):
         for produce_move in produce_moves:
             if produce_move.has_tracking != 'none':
                 original = original_quants.filtered(lambda quant: quant.product_id == produce_move.product_id)
+                if not original.lot_id:
+                    raise UserError(_("You don't have in the stock the required lot/serial number for %s .") % (produce_move.product_id.name,))
                 self.env['stock.move.lots'].create({
                     'move_id': produce_move.id,
                     'lot_id': original.lot_id.id,