diff --git a/src/sys/include/net/netif.h b/src/sys/include/net/netif.h
index 545ec7e..64f6607 100644
--- a/src/sys/include/net/netif.h
+++ b/src/sys/include/net/netif.h
@@ -44,6 +44,17 @@
 
 #include "net/pbuf.h"
 
+struct route_cache_entry {
+  struct route_cache_entry *next;
+  uInt8 num;
+  struct ip_addr ip_addr;
+  struct ip_addr netmask;  /* netmask in network byte order */
+  struct ip_addr gw;
+  char hwaddr[6];
+  char name[2];
+}
+
+void route_cache_init();
 
 struct netif {
   struct netif *next;