diff --git a/include/sys/socket.h b/include/sys/socket.h
index 08488c8b..9fd20256 100644
--- a/include/sys/socket.h
+++ b/include/sys/socket.h
@@ -199,6 +199,7 @@ struct linger
 #define SO_NOFCS                43
 #define SO_LOCK_FILTER          44
 #define SO_SELECT_ERR_QUEUE     45
+#define SO_BUSY_POLL            46
 
 #ifndef SOL_SOCKET
 #define SOL_SOCKET      1