net.ipv6.conf.all.send_redirects

[Bit Gossip]

Experts,
in IPv4 it was possible to disable sending ICMP redirect as simple as:

# sysctl -w net.ipv4.conf.all.send_redirects=0
net.ipv4.conf.all.send_redirects = 0

Unfortunately the same key seems to have disappeared in IPv6:

# sysctl -w net.ipv6.conf.all.send_redirects=0
error: "net.ipv6.conf.all.send_redirects" is an unknown key

Any idea how to disable sending ICMP redirect?
Thanks!