diff --git a/kamailio/defs.cfg b/kamailio/defs.cfg
index 3efe795..01b8d8d 100644
--- a/kamailio/defs.cfg
+++ b/kamailio/defs.cfg
@@ -2,6 +2,8 @@
 
 
 ####### defs ########
+#!ifndef DEFAULTS_INCLUDED
+#!trydef DEFAULTS_INCLUDED
 
 #!ifndef MY_HOSTNAME
 #!substdef "!MY_HOSTNAME!$HN(f)!g"
@@ -111,4 +113,6 @@
 #!trydef KZ_PRESENCE_FAST_PICKUP_COOKIES 1
 #!trydef KZ_PRESENCE_FAST_PICKUP_REALTIME 1
 
+#!endif
+
 # vim: tabstop=4 softtabstop=4 shiftwidth=4 expandtab
diff --git a/kamailio/local.cfg b/kamailio/local.cfg
index 2ed1086..807b296 100644
--- a/kamailio/local.cfg
+++ b/kamailio/local.cfg
@@ -126,6 +126,7 @@
 # # #!define SIP_TRACE_URI "sip:127.0.0.1:9060"
 # # #!define HEP_CAPTURE_ID 1
 
+include_file "defs.cfg"
 
 ## YOU SHOULD NOT HAVE TO CHANGE THESE!
 ##     By setting MY_IP_ADDRESS above these will resolve