diff --git a/config/jail.conf b/config/jail.conf
index 735f028c..07f9cacc 100644
--- a/config/jail.conf
+++ b/config/jail.conf
@@ -423,6 +423,6 @@ logpath = /var/log/exim/mainlog
 [perdition]
 enabled = false
 filter = perdition
-action = iptables-multiport[name=perdition="110,143,993,995"]
+action = iptables-multiport[name=perdition,port="110,143,993,995"]
 logpath  = /var/log/maillog