diff --git a/kamailio/registrar-role.cfg b/kamailio/registrar-role.cfg
index 15bd3fd..1531570 100644
--- a/kamailio/registrar-role.cfg
+++ b/kamailio/registrar-role.cfg
@@ -2,6 +2,7 @@
 #!trydef REGISTRAR_NAT_PING_WORKERS 5
 #!trydef REGISTRAR_MIN_EXPIRES 300
 #!trydef REGISTRAR_MAX_EXPIRES 3600
+#!trydef REGISTRAR_CONTACT_MAX_SIZE 2048
 
 ######## Generic Hash Table container in shared memory ########
 modparam("htable", "htable", "auth_cache=>size=16;autoexpire=7200;")
@@ -54,6 +55,7 @@ modparam("registrar", "path_mode", 1)
 modparam("registrar", "use_path", 1)
 modparam("registrar", "received_param", "")
 ##modparam("registrar", "xavp_rcd", "ulrcd")
+modparam("registrar", "contact_max_size", REGISTRAR_CONTACT_MAX_SIZE)
 
 ####### Registrar Logic ########
 route[HANDLE_REGISTER]