diff --git a/kamailio/defs.cfg b/kamailio/defs.cfg
index c406ea7..c9a3ddd 100644
--- a/kamailio/defs.cfg
+++ b/kamailio/defs.cfg
@@ -47,10 +47,6 @@
 #!trydef CHILDREN 25
 #!trydef TCP_CHILDREN 25
 
-#!ifndef ANTIFLOOD_CACHE_PERIOD
-#!substdef "!ANTIFLOOD_CACHE_PERIOD!600!g"
-#!endif
-
 #!include_file "defs-amqp.cfg"
 
 #!ifndef MEDIA_SERVERS_HASH_SIZE