diff --git a/ripd/ripd.c b/ripd/ripd.c
index 870873d..82b1ada 100644
--- a/ripd/ripd.c
+++ b/ripd/ripd.c
@@ -1577,7 +1577,7 @@
 /* Add redistributed route to RIP table. */
 void
 rip_redistribute_add (int type, int sub_type, struct prefix_ipv4 *p, 
-		      unsigned int ifindex, struct in_addr *nexthop,
+		      ifindex_t ifindex, struct in_addr *nexthop,
                       unsigned int metric, unsigned char distance)
 {
   int ret;
@@ -1651,7 +1651,7 @@
 /* Delete redistributed route from RIP table. */
 void
 rip_redistribute_delete (int type, int sub_type, struct prefix_ipv4 *p, 
-			   unsigned int ifindex)
+			 ifindex_t ifindex)
 {
   int ret;
   struct route_node *rp;
@@ -1793,7 +1793,7 @@
 /* Read RIP packet by recvmsg function. */
 int
 rip_recvmsg (int sock, u_char *buf, int size, struct sockaddr_in *from,
-	     int *ifindex)
+	     ifindex_t *ifindex)
 {
   int ret;
   struct msghdr msg;
@@ -1834,7 +1834,7 @@
   int sock;
   char buf[RIP_PACKET_MAXSIZ];
   struct sockaddr_in from;
-  unsigned int ifindex;
+  ifindex_t ifindex;
   
   /* Fetch socket then register myself. */
   sock = THREAD_FD (t);