diff --git a/include/netinet/udp.h b/include/netinet/udp.h
index 756b8d26e9..36a9a80aec 100644
--- a/include/netinet/udp.h
+++ b/include/netinet/udp.h
@@ -31,4 +31,27 @@
  * Pre-processor Definitions
  ****************************************************************************/
 
+/* UDP header as specified by RFC 768, August 1980. */
+
+struct udphdr
+{
+  union
+  {
+    struct
+    {
+      uint16_t uh_sport;        /* source port */
+      uint16_t uh_dport;        /* destination port */
+      uint16_t uh_ulen;         /* udp length */
+      uint16_t uh_sum;          /* udp checksum */
+    };
+    struct
+    {
+      uint16_t source;
+      uint16_t dest;
+      uint16_t len;
+      uint16_t check;
+    };
+  };
+};
+
 #endif /* __INCLUDE_NETINET_UDP_H */