1 files changed, 3 insertions, 0 deletions
diff --git a/slirp/dhcpv6.h b/slirp/dhcpv6.h
index 9189cd3f2d..3373f6cb89 100644
--- a/slirp/dhcpv6.h
+++ b/slirp/dhcpv6.h
@@ -17,6 +17,9 @@
                             0x00, 0x00, 0x00, 0x00,\
                             0x00, 0x01, 0x00, 0x02 } }
 
+#define in6_dhcp_multicast(a)\
+    in6_equal(a, &(struct in6_addr)ALLDHCP_MULTICAST)
+
 void dhcpv6_input(struct sockaddr_in6 *srcsas, struct mbuf *m);
 
 #endif