diff --git a/include/sys/socket.h b/include/sys/socket.h
index f1489186e38066bcb13052216019a844e16e4961..19b2aa55c0a0129a5c89087d910df863a7853e17 100644
--- a/include/sys/socket.h
+++ b/include/sys/socket.h
@@ -150,6 +150,8 @@ struct linger
 #define SO_SNDLOWAT     19
 #define SO_RCVTIMEO     20
 #define SO_SNDTIMEO     21
+#define SO_SNDBUFFORCE  32
+#define SO_RCVBUFFORCE  33
 #endif