diff --git a/include/netinet/in.h b/include/netinet/in.h
index 813db3d4469..c031254e19b 100644
--- a/include/netinet/in.h
+++ b/include/netinet/in.h
@@ -118,6 +118,8 @@
                                                     * to INADDR_ANY */
 #define IP_PKTINFO            (__SO_PROTOCOL + 12) /* Get some information about
                                                     * the incoming packet */
+#define IP_TOS                (__SO_PROTOCOL + 13) /* Access the Type-Of-Service
+                                                    * (TOS) field  */
 
 /* SOL_IPV6 protocol-level socket options. */
 
diff --git a/include/netinet/tcp.h b/include/netinet/tcp.h
index 70dee655a4b..c678d61b85f 100644
--- a/include/netinet/tcp.h
+++ b/include/netinet/tcp.h
@@ -68,5 +68,6 @@
                                            * Argument: struct timeval */
 #define TCP_KEEPCNT   (__SO_PROTOCOL + 3) /* Number of keepalives before death
                                            * Argument: max retry count */
+#define TCP_MAXSEG    (__SO_PROTOCOL + 4) /* The maximum segment size */
 
 #endif /* __INCLUDE_NETINET_TCP_H */