diff --git a/addons/website_theme_install/models/ir_module_module.py b/addons/website_theme_install/models/ir_module_module.py
index f9ccc7b4bc7..0efa044a5c0 100644
--- a/addons/website_theme_install/models/ir_module_module.py
+++ b/addons/website_theme_install/models/ir_module_module.py
@@ -48,6 +48,7 @@ class IrModuleModule(models.Model):
         for attach in self._get_module_data('theme.ir.attachment'):
             already_create = loaded['attachments'].filtered(lambda x: x.key == attach.key)
             new_attach = {
+                'key': attach.key,
                 'public': True,
                 'res_model': 'ir.ui.view',
                 'type': 'url',