diff --git a/addons/email_template/wizard/mail_compose_message.py b/addons/email_template/wizard/mail_compose_message.py
index e9f539a22b2..9dad18e07f3 100644
--- a/addons/email_template/wizard/mail_compose_message.py
+++ b/addons/email_template/wizard/mail_compose_message.py
@@ -141,7 +141,7 @@ class mail_compose_message(osv.TransientModel):
         # legacy template behavior: void values do not erase existing values and the
         # related key is removed from the values dict
         if partner_ids:
-            values['partner_ids'] = [(6, 0, list(partner_ids))]
+            values['partner_ids'] = list(partner_ids)
 
         return values