diff --git a/Usermode/Libraries/libpsocket.so_src/include_exp/sys/socket.h b/Usermode/Libraries/libpsocket.so_src/include_exp/sys/socket.h
index 18c40e734694c9c4417e90933c01c2941938b618..deb1f51e7e3de3f63fc43c9faa5a2f7e9ccc9bc0 100644
--- a/Usermode/Libraries/libpsocket.so_src/include_exp/sys/socket.h
+++ b/Usermode/Libraries/libpsocket.so_src/include_exp/sys/socket.h
@@ -108,6 +108,13 @@ enum
 	SHUT_RDWR
 };
 
+// flags for send*
+//#define MSG_CONFIRM	0x01
+#define MSG_DONTROUTE	0x02
+#define MSG_OOB 	0x40
+// flags for recv
+#define MSG_PEEK	0x100
+
 /**
  * \brief Create a new socket descriptor
  * \param domain	Address family