diff --git a/conf/default_settings.conf b/conf/default_settings.conf
index e61981d..b138d15 100644
--- a/conf/default_settings.conf
+++ b/conf/default_settings.conf
@@ -76,7 +76,7 @@ standard_mailuser_ports="587,465,110,995,143,993"
 #     Clamp the advertised MSS of incoming HTTPS SYN packets to 1360.
 #
 throttle_tcp6_mss_for_https=false
-default_min_tcp6_mss_for_https_val=1280
+min_tcp6_mss_for_https_val=1280
 
 # ip6t-firewall-server,ipt-firewall-server:
 #     some restrictions on HTTP connections to counteract attacks.