diff --git a/net/ipv6/addrconf_core.c b/net/ipv6/addrconf_core.c
index faaefb6..3f82e95 100644
--- a/net/ipv6/addrconf_core.c
+++ b/net/ipv6/addrconf_core.c
@@ -50,6 +50,9 @@
 	if ((st & htonl(0xFFC00000)) == htonl(0xFEC00000))
 		return (IPV6_ADDR_SITELOCAL | IPV6_ADDR_UNICAST |
 			IPV6_ADDR_SCOPE_TYPE(IPV6_ADDR_SCOPE_SITELOCAL));		/* addr-select 3.1 */
+	if ((st & htonl(0xFE000000)) == htonl(0xFC000000))
+		return (IPV6_ADDR_UNICAST |
+			IPV6_ADDR_SCOPE_TYPE(IPV6_ADDR_SCOPE_GLOBAL));			/* RFC 4193 */
 
 	if ((addr->s6_addr32[0] | addr->s6_addr32[1]) == 0) {
 		if (addr->s6_addr32[2] == 0) {