diff --git a/man7/ipv6.7 b/man7/ipv6.7
index ccaed0f7e..179591e2f 100644
--- a/man7/ipv6.7
+++ b/man7/ipv6.7
@@ -80,7 +80,7 @@ structure.
 .\"	    commit c4062dfc425e94290ac427a98d6b4721dd2bc91f
 .\"	    Author: Erich E. Hoover <ehoover@mines.edu>
 .\"
-.TH IPV6 7 2012-11-07 "Linux" "Linux Programmer's Manual"
+.TH IPV6 7 2012-12-16 "Linux" "Linux Programmer's Manual"
 .SH NAME
 ipv6 \- Linux IPv6 protocol implementation
 .SH SYNOPSIS
@@ -215,6 +215,10 @@ Argument is a pointer to a
 .I struct ipv6_mreq
 .TP
 .B IPV6_MTU
+Retrieve the current known path MTU of the current socket.
+Only valid when the socket has been connected.
+Returns an integer.
+
 Set the MTU to be used for the socket.
 The MTU is limited by the device
 MTU or the path MTU when path MTU discovery is enabled.