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-rw-r--r--src/radv-protocol.h1
1 files changed, 1 insertions, 0 deletions
diff --git a/src/radv-protocol.h b/src/radv-protocol.h
index 9e53d8e..e576012 100644
--- a/src/radv-protocol.h
+++ b/src/radv-protocol.h
@@ -49,6 +49,7 @@ struct prefix_opt {
#define ICMP6_OPT_SOURCE_MAC 1
#define ICMP6_OPT_PREFIX 3
#define ICMP6_OPT_MTU 5
+#define ICMP6_OPT_ADV_INTERVAL 7
#define ICMP6_OPT_RDNSS 25
#define ICMP6_OPT_DNSSL 31