diff --git a/addons/website/models/ir_module_module.py b/addons/website/models/ir_module_module.py
index 5d2f89a23e5..8bf2c5f86ea 100644
--- a/addons/website/models/ir_module_module.py
+++ b/addons/website/models/ir_module_module.py
@@ -76,7 +76,7 @@ class IrModuleModule(models.Model):
 
                     -> We want to upgrade every website using this theme.
         """
-        if request and request.db and request.context.get('apply_new_theme'):
+        if request and request.db and request.env and request.context.get('apply_new_theme'):
             self = self.with_context(apply_new_theme=True)
 
         for module in self: