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-rw-r--r--inet/netinet/igmp.h1
1 files changed, 1 insertions, 0 deletions
diff --git a/inet/netinet/igmp.h b/inet/netinet/igmp.h
index dccdb11eda..451b1abf47 100644
--- a/inet/netinet/igmp.h
+++ b/inet/netinet/igmp.h
@@ -86,6 +86,7 @@ struct igmp {
 
 #define IGMP_MTRACE_RESP		0x1e	/* traceroute resp.(to sender)*/
 #define IGMP_MTRACE			0x1f	/* mcast traceroute messages  */
+#define IGMP_MRDISC_ADV			0x30	/* From RFC4286.  */
 
 #define IGMP_MAX_HOST_REPORT_DELAY	10	/* max delay for response to     */
 						/*  query (in seconds) according */