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-rw-r--r--sysdeps/unix/sysv/linux/bits/in.h2
1 files changed, 2 insertions, 0 deletions
diff --git a/sysdeps/unix/sysv/linux/bits/in.h b/sysdeps/unix/sysv/linux/bits/in.h
index 88cc125b4d..5842c7c873 100644
--- a/sysdeps/unix/sysv/linux/bits/in.h
+++ b/sysdeps/unix/sysv/linux/bits/in.h
@@ -51,6 +51,8 @@
 #define MCAST_LEAVE_SOURCE_GROUP 47
 #define MCAST_MSFILTER 48
 
+#define MCAST_EXCLUDE   0
+#define MCAST_INCLUDE   1
 
 #define IP_ROUTER_ALERT    5	/* bool */
 #define IP_PKTINFO         8	/* bool */