diff --git a/man7/ip.7 b/man7/ip.7
index ffabff08a..519528209 100644
--- a/man7/ip.7
+++ b/man7/ip.7
@@ -29,14 +29,11 @@
 .\"	MCAST_JOIN_SOURCE_GROUP (2.4.22 / 2.6)
 .\"	MCAST_LEAVE_SOURCE_GROUP (2.4.22 / 2.6)
 .\"	MCAST_MSFILTER (2.4.22 / 2.6)
-.\"	IP_MULTICAST_ALL (2.6.31)
-.\"	    commit f771bef98004d9d141b085d987a77d06669d4f4f
-.\"	    Author: Nivedita Singhvi <niv@us.ibm.com>
 .\"	IP_UNICAST_IF (3.4)
 .\"	    commit 76e21053b5bf33a07c76f99d27a74238310e3c71
 .\"	    Author: Erich E. Hoover <ehoover@mines.edu>
 .\"
-.TH IP  7 2013-02-12 "Linux" "Linux Programmer's Manual"
+.TH IP  7 2013-04-16 "Linux" "Linux Programmer's Manual"
 .SH NAME
 ip \- Linux IPv4 protocol implementation
 .SH SYNOPSIS
@@ -525,6 +522,17 @@ This is also particularly useful for diagnostic tools such as
 that wish to deliberately send probe packets larger than
 the observed Path MTU.
 .TP
+.BR IP_MULTICAST_ALL " (since Linux 2.6.31)"
+This option can be used to modify the delivery policy of multicast messages
+to sockets bound to the wildcard
+.B INADDR_ANY
+address. The argument is a boolean integer (defaults to 1). If set to 1,
+the socket will receive messages from all the groups that have been joined
+globally on the whole system. Otherwise, it will deliver only messages from
+the groups that have been explicitly joined (for example via the
+.B IP_ADD_MEMBERSHIP
+option) on this particular socket.
+.TP
 .BR IP_MULTICAST_IF " (since Linux 1.2)"
 Set the local device for a multicast socket.
 Argument is an