REGISTER_LONG_CONSTANT("SO_ERROR", SO_ERROR, CONST_CS | CONST_PERSISTENT);
REGISTER_LONG_CONSTANT("SOL_SOCKET", SOL_SOCKET, CONST_CS | CONST_PERSISTENT);
REGISTER_LONG_CONSTANT("SOMAXCONN", SOMAXCONN, CONST_CS | CONST_PERSISTENT);
+#ifdef TCP_NODELAY
+ REGISTER_LONG_CONSTANT("TCP_NODELAY", TCP_NODELAY, CONST_CS | CONST_PERSISTENT);
+#endif
REGISTER_LONG_CONSTANT("PHP_NORMAL_READ", PHP_NORMAL_READ, CONST_CS | CONST_PERSISTENT);
REGISTER_LONG_CONSTANT("PHP_BINARY_READ", PHP_BINARY_READ, CONST_CS | CONST_PERSISTENT);