diff --git a/libc/include/netinet/tcp.h b/libc/include/netinet/tcp.h
index bc52249..5601645 100644
--- a/libc/include/netinet/tcp.h
+++ b/libc/include/netinet/tcp.h
@@ -25,10 +25,10 @@
  * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  * SUCH DAMAGE.
  */
+
 #ifndef _NETINET_TCP_H
 #define _NETINET_TCP_H
 
-#include <endian.h>		/* Include *before* linux/tcp.h */
 #include <linux/tcp.h>
 
 __BEGIN_DECLS
@@ -47,6 +47,21 @@
   TCP_CLOSING
 };
 
+#define TCPOPT_EOL 0
+#define TCPOPT_NOP 1
+#define TCPOPT_MAXSEG 2
+#define TCPOLEN_MAXSEG 4
+#define TCPOPT_WINDOW 3
+#define TCPOLEN_WINDOW 3
+#define TCPOPT_SACK_PERMITTED 4
+#define TCPOLEN_SACK_PERMITTED 2
+#define TCPOPT_SACK 5
+#define TCPOPT_TIMESTAMP 8
+#define TCPOLEN_TIMESTAMP 10
+#define TCPOLEN_TSTAMP_APPA (TCPOLEN_TIMESTAMP+2)
+
+#define TCPOPT_TSTAMP_HDR (TCPOPT_NOP<<24|TCPOPT_NOP<<16|TCPOPT_TIMESTAMP<<8|TCPOLEN_TIMESTAMP)
+
 __END_DECLS
 
 #endif /* _NETINET_TCP_H */