diff --git a/lib/isc/win32/include/isc/ipv6.h b/lib/isc/win32/include/isc/ipv6.h
new file mode 100644
index 0000000000..ad99c99ef6
--- /dev/null
+++ b/lib/isc/win32/include/isc/ipv6.h
@@ -0,0 +1,104 @@
+/*
+ * Copyright (C) 2000, 2001  Internet Software Consortium.
+ *
+ * Permission to use, copy, modify, and distribute this software for any
+ * purpose with or without fee is hereby granted, provided that the above
+ * copyright notice and this permission notice appear in all copies.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS" AND INTERNET SOFTWARE CONSORTIUM
+ * DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING ALL
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL
+ * INTERNET SOFTWARE CONSORTIUM BE LIABLE FOR ANY SPECIAL, DIRECT,
+ * INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING
+ * FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT,
+ * NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION
+ * WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+ */
+
+#ifndef ISC_IPV6_H
+#define ISC_IPV6_H 1
+
+/*****
+ ***** Module Info
+ *****/
+
+/*
+ * This file defines additional information necessary for IP v6 support
+ */
+
+#ifndef AF_INET6
+#define AF_INET6 99
+#endif
+
+#ifndef PF_INET6
+#define PF_INET6 AF_INET6
+#endif
+
+#define s6_addr8	s6_addr
+#define in6_addr in_addr6
+
+#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 }}
+
+LIBISC_EXTERNAL_DATA extern const struct in_addr6 in6addr_any;
+LIBISC_EXTERNAL_DATA extern const struct in_addr6 in6addr_loopback;
+
+//#define in6addr_any _in6addr_any
+//#define in6addr_loopback _in6addr_loopback
+
+#ifndef ISC_PLATFORM_HAVEIN6PKTINFO
+struct in6_pktinfo {
+	struct in6_addr ipi6_addr;    /* src/dst IPv6 address */
+	unsigned int    ipi6_ifindex; /* send/recv interface index */
+};
+#endif
+
+/*
+ * Unspecified
+ */
+
+#define IN6_IS_ADDR_UNSPECIFIED(x)      \
+*((u_long *)((x)->s6_addr)    ) == 0 && \
+*((u_long *)((x)->s6_addr) + 1) == 0 && \
+*((u_long *)((x)->s6_addr) + 2) == 0 && \
+*((u_long *)((x)->s6_addr) + 3) == 1 \
+)
+
+/*
+ * Loopback
+ */
+#define IN6_IS_ADDR_LOOPBACK(x) (\
+*((u_long *)((x)->s6_addr)    ) == 0 && \
+*((u_long *)((x)->s6_addr) + 1) == 0 && \
+*((u_long *)((x)->s6_addr) + 2) == 0 && \
+*((u_long *)((x)->s6_addr) + 3) == 1 \
+)
+
+/*
+ * IPv4 compatible
+ */
+#define IN6_IS_ADDR_V4COMPAT(x)  (\
+*((u_long *)((x)->s6_addr)    ) == 0 && \
+*((u_long *)((x)->s6_addr) + 1) == 0 && \
+*((u_long *)((x)->s6_addr) + 2) == 0 && \
+*((u_long *)((x)->s6_addr) + 3) != 0 && \
+*((u_long *)((x)->s6_addr) + 3) != htonl(1) \
+)
+
+/*
+ * Mapped
+ */
+#define IN6_IS_ADDR_V4MAPPED(x) (\
+*((u_long *)((x)->s6_addr)    ) == 0 && \
+*((u_long *)((x)->s6_addr) + 1) == 0 && \
+*((u_long *)((x)->s6_addr) + 2) == htonl(0x0000ffff))
+
+/*
+ * Multicast
+ */
+#define IN6_IS_ADDR_MULTICAST(a)	\
+	((a)->s6_addr8[0] == 0xffU)
+
+ISC_LANG_ENDDECLS
+
+#endif /* ISC_IPV6_H */