diff --git a/include/sys/socket.h b/include/sys/socket.h
index 396a47ad..26d16bdf 100644
--- a/include/sys/socket.h
+++ b/include/sys/socket.h
@@ -263,6 +263,7 @@ struct linger {
 #define SOL_ALG         279
 #define SOL_NFC         280
 #define SOL_KCM         281
+#define SOL_TLS         282
 
 #define SOMAXCONN       128