diff --git a/src/modules/nathelper/doc/nathelper_admin.xml b/src/modules/nathelper/doc/nathelper_admin.xml
index b5a5b08167b..2ab9f00ff89 100644
--- a/src/modules/nathelper/doc/nathelper_admin.xml
+++ b/src/modules/nathelper/doc/nathelper_admin.xml
@@ -173,13 +173,13 @@ modparam("nathelper", "natping_interval", 10)
ping_nated_only (integer)
If this parameter is set to 1 then only contacts that have
- behind_NAT
flag in user location database set will
- get ping.
+ the behind NAT nat_bflag
flag in user location
+ database set will get ping.
- If it is 0 and sipping_flag is not set, then the 4-bytes UDP ping is
- sent to all contacts. If it is 0 and sipping_flag parameter is set, then
- SIP-request-based pinging is sent to all contacts.
+ If it is 0 and sipping_bflag is not set, then the 4-bytes UDP ping
+ is sent to all contacts. If it is 0 and sipping_bflag parameter
+ is set, then SIP-request-based pinging is sent to all contacts.