diff --git a/lib/isc/include/isc/ipv6.h b/lib/isc/include/isc/ipv6.h
index 9ea4ce621c..ed2d39991d 100644
--- a/lib/isc/include/isc/ipv6.h
+++ b/lib/isc/include/isc/ipv6.h
@@ -63,6 +63,12 @@ struct in6_addr {
 };
 #define s6_addr _S6_un._S6_u8
 
+#define IN6ADDR_ANY_INIT 	{{{ 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0 }}}
+#define IN6ADDR_LOOPBACK_INIT 	{{{ 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1 }}}
+
+extern struct in6_addr in6addr_any;
+extern struct in6_addr in6addr_loopback;
+
 struct sockaddr_in6 {
 #ifdef ISC_NET_HAVESALEN
 	isc_uint8_t		sin6_len;