diff --git a/modules/incoterm/common.py b/modules/incoterm/common.py
index c32adf9..d63c556 100755
--- a/modules/incoterm/common.py
+++ b/modules/incoterm/common.py
@@ -12,7 +12,7 @@ __all__ = ['IncotermMixin', 'IncotermAvailableMixin']
 class IncotermMixin(Model):
 
     incoterm = fields.Many2One(
-        'incoterm.incoterm', lazy_gettext('incoterm.msg_incoterm'), required=True,
+        'incoterm.incoterm', lazy_gettext('incoterm.msg_incoterm'), required=False,
         ondelete='RESTRICT')
     incoterm_location = fields.Many2One(
         'party.address', lazy_gettext('incoterm.msg_incoterm_location'),