diff --git a/addons/lunch/security/lunch_security.xml b/addons/lunch/security/lunch_security.xml
index af1f0317b4e..e06b32311cc 100644
--- a/addons/lunch/security/lunch_security.xml
+++ b/addons/lunch/security/lunch_security.xml
@@ -8,7 +8,7 @@
         </record>
         <record id="group_lunch_manager" model="res.groups">
             <field name="name">Manager</field>
-            <field name="implied_ids" eval="[(4, ref('group_lunch_user'))]"/>
+            <field name="implied_ids" eval="[(4, [ref('group_lunch_user')])]"/>
             <field name="category_id" ref="module_lunch_category"/>
         </record>
         <record id="group_lunch_user" model="res.groups">