diff --git a/contract/models/contract.py b/contract/models/contract.py
index 3c6c54f71..bf6bd890f 100644
--- a/contract/models/contract.py
+++ b/contract/models/contract.py
@@ -472,7 +472,7 @@ class ContractContract(models.Model):
         compose_form = self.env.ref("mail.email_compose_message_wizard_form")
         ctx = dict(
             default_model="contract.contract",
-            default_res_id=self.id,
+            default_res_ids=self.ids,
             default_use_template=bool(template),
             default_template_id=template and template.id or False,
             default_composition_mode="comment",