diff --git a/src/modules/nathelper/README b/src/modules/nathelper/README
index 55a12450536..102a639ea06 100644
--- a/src/modules/nathelper/README
+++ b/src/modules/nathelper/README
@@ -249,15 +249,14 @@ Chapter 1. Admin Guide
 
 4.1. force_socket (string)
 
-   Socket to be used when sending NAT pings for UDP communication.
-   It uses the first socket it finds based on the IP address. If
-   no one specified, the OS will choose a socket.
+   Socket to be used when sending NAT pings for UDP communication. If no
+   one specified, the OS will choose a socket.
 
    Default value is “NULL”.
 
    Example 1.1. Set force_socket parameter
 ...
-modparam("nathelper", "force_socket", "127.0.0.1")
+modparam("nathelper", "force_socket", "127.0.0.1:5060")
 ...
 
 4.2. natping_interval (integer)