diff --git a/include/net.h b/include/net.h
index 4873000c0d87b1adbb6f871dbce23dd964b19851..1c8ab12454b7e80de56eaaf8572f1fe3899e8957 100644
--- a/include/net.h
+++ b/include/net.h
@@ -517,6 +517,9 @@ extern ushort getenv_VLAN(char *);
 /* copy a filename (allow for "..." notation, limit length) */
 extern void	copy_filename (char *dst, char *src, int size);
 
+/* get a random source port */
+extern unsigned int random_port(void);
+
 /**********************************************************************/
 
 #endif /* __NET_H__ */