diff --git a/odoo/osv/expression.py b/odoo/osv/expression.py
index 5be77f295a8..14d38dedbba 100644
--- a/odoo/osv/expression.py
+++ b/odoo/osv/expression.py
@@ -800,7 +800,7 @@ class expression(object):
 
             elif field.type == 'one2many':
                 domain = field.get_domain_list(model)
-                inverse_is_int = comodel._fields[field.inverse_name].type == 'integer'
+                inverse_is_int = comodel._fields[field.inverse_name].type in ('integer', 'many2one_reference')
                 unwrap_inverse = (lambda ids: ids) if inverse_is_int else (lambda recs: recs.ids)
 
                 if right is not False: