diff --git a/doc/man-sections/server-options.rst b/doc/man-sections/server-options.rst
index 047f2270..b026ac7b 100644
--- a/doc/man-sections/server-options.rst
+++ b/doc/man-sections/server-options.rst
@@ -467,8 +467,13 @@ fast hardware. SSL/TLS authentication must be used in this mode.
   When ``--push-peer-info`` is enabled the additional information consists
   of the following data:
 
-  :code:`IV_HWADDR=<mac address>`
-        The MAC address of clients default gateway
+  :code:`IV_HWADDR=<string>`
+        This is intended to be a unique and persistent ID of the client.
+        The string value can be any readable ASCII string up to 64 bytes.
+        OpenVPN 2.x and some other implementations use the MAC address of
+        the client's default gateway. If this string is generated by the
+        client, it should be consistent and preserved across independent
+        session and preferably re-installations and upgrades.
 
   :code:`IV_SSL=<version string>`
         The ssl version used by the client, e.g.