diff --git a/templates/main.cf.j2 b/templates/main.cf.j2
index ffb3ded..58df795 100644
--- a/templates/main.cf.j2
+++ b/templates/main.cf.j2
@@ -627,7 +627,7 @@ broken_sasl_auth_clients = yes
 smtpd_data_restrictions = reject_unauth_pipelining
 {% endif %}
 {% if postfix_reject_sender_login_mismatch %}
-smtpd_sender_login_maps
+smtpd_sender_login_maps =
 {% for login_map in postfix_smtpd_sender_login_maps %}
         {{ login_map }}
 {% endfor %}