diff --git a/CHANGES b/CHANGES
index 683aa38954..bc0487bb56 100644
--- a/CHANGES
+++ b/CHANGES
@@ -1,3 +1,4 @@
+ 910.	[port]		Some pre-RFC2133 IPv6 do not define IN6ADDR_ANY_INIT.
 
  908.	[func]		New program, rndc-confgen, to simplify setting up rndc.
 
diff --git a/lib/isc/unix/include/isc/net.h b/lib/isc/unix/include/isc/net.h
index 6ebe1d904b..bf3c3866fa 100644
--- a/lib/isc/unix/include/isc/net.h
+++ b/lib/isc/unix/include/isc/net.h
@@ -15,7 +15,7 @@
  * WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
  */
 
-/* $Id: net.h,v 1.28 2001/05/31 10:54:51 tale Exp $ */
+/* $Id: net.h,v 1.29 2001/06/25 03:56:58 marka Exp $ */
 
 #ifndef ISC_NET_H
 #define ISC_NET_H 1
@@ -95,6 +95,29 @@
 #define in6_addr in_addr6	/* Required for pre RFC2133 implementations. */
 #endif
 
+/*
+ * Required for some pre RFC2133 implementations.
+ * IN6ADDR_ANY_INIT and IN6ADDR_LOOPBACK_INIT were added in
+ * draft-ietf-ipngwg-bsd-api-04.txt or draft-ietf-ipngwg-bsd-api-05.txt.  
+ * If 's6_addr' is defined then assume that there is a union and three
+ * levels otherwise assume two levels required.
+ */
+#ifndef IN6ADDR_ANY_INIT
+#ifdef s6_addr
+#define IN6ADDR_ANY_INIT { { { 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0 } } }
+#else
+#define IN6ADDR_ANY_INIT { { 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0 } }
+#endif
+#endif
+
+#ifndef IN6ADDR_LOOPBACK_INIT
+#ifdef s6_addr
+#define IN6ADDR_LOOPBACK_INIT { { { 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1 } } }
+#else
+#define IN6ADDR_LOOPBACK_INIT { { 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1 } }
+#endif
+#endif
+
 #ifndef AF_INET6
 #define AF_INET6 99
 #endif