diff --git a/roles/base/tasks/postfix.yml b/roles/base/tasks/postfix.yml
index bd3fd1c956..cd3fc7cb0c 100644
--- a/roles/base/tasks/postfix.yml
+++ b/roles/base/tasks/postfix.yml
@@ -32,7 +32,7 @@
 
 - name: Deploy sender_access file
   copy: src="{{private}}/files/smtpd/sender_access" dest="/etc/postfix/sender_access"
-  when: "{{postfix_group}} == 'smtp-mm'"
+  when: "'{{postfix_group}}' == 'smtp-mm'"
   tags:
   - postfix
   - config