diff --git a/document_multiple_records/document.py b/document_multiple_records/document.py
index 48ebb228..3c8af5cc 100644
--- a/document_multiple_records/document.py
+++ b/document_multiple_records/document.py
@@ -36,9 +36,9 @@ class document_file(orm.Model):
         ir_attachment_document_obj = self.pool.get('ir.attachment.document')
         original_data = {key: data[key] for key in data.keys()}
         # Don't save this information below
-        data['res_model'] = ''
-        data['res_id'] = ''
-        data['res_name'] = ''
+        data['res_model'] = '' if data['res_model'] else False
+        data['res_id'] = '' if data['res_id'] else False
+        data['res_name'] = '' if data['res_name'] else False
         res = super(document_file, self).create(cr, uid, data, context=context)
         # Create attachment_document_ids with res_model, res_id and res_name
         if 'res_model' and 'res_id' in original_data: