diff --git a/libc/kernel/uapi/linux/tipc.h b/libc/kernel/uapi/linux/tipc.h
index cf16725..b8b4965 100644
--- a/libc/kernel/uapi/linux/tipc.h
+++ b/libc/kernel/uapi/linux/tipc.h
@@ -121,6 +121,16 @@
 #define TIPC_SOCK_RECVQ_DEPTH 132
 #define TIPC_MCAST_BROADCAST 133
 #define TIPC_MCAST_REPLICAST 134
+#define TIPC_GROUP_JOIN 135
+#define TIPC_GROUP_LEAVE 136
+#define TIPC_GROUP_LOOPBACK 0x1
+#define TIPC_GROUP_MEMBER_EVTS 0x2
+struct tipc_group_req {
+  __u32 type;
+  __u32 instance;
+  __u32 scope;
+  __u32 flags;
+};
 #define TIPC_MAX_MEDIA_NAME 16
 #define TIPC_MAX_IF_NAME 16
 #define TIPC_MAX_BEARER_NAME 32