diff --git a/ripngd/ripngd.c b/ripngd/ripngd.c
index 97a1392..d27d45b 100644
--- a/ripngd/ripngd.c
+++ b/ripngd/ripngd.c
@@ -229,7 +229,7 @@
 /* Receive UDP RIPng packet from socket. */
 static int
 ripng_recv_packet (int sock, u_char *buf, int bufsize,
-		   struct sockaddr_in6 *from, unsigned int *ifindex, 
+		   struct sockaddr_in6 *from, ifindex_t *ifindex, 
 		   int *hoplimit)
 {
   int ret;
@@ -971,7 +971,7 @@
 /* Add redistributed route to RIPng table. */
 void
 ripng_redistribute_add (int type, int sub_type, struct prefix_ipv6 *p, 
-			unsigned int ifindex, struct in6_addr *nexthop)
+			ifindex_t ifindex, struct in6_addr *nexthop)
 {
   struct route_node *rp;
   struct ripng_info *rinfo = NULL, newinfo;
@@ -1041,7 +1041,7 @@
 /* Delete redistributed route to RIPng table. */
 void
 ripng_redistribute_delete (int type, int sub_type, struct prefix_ipv6 *p, 
-			   unsigned int ifindex)
+			   ifindex_t ifindex)
 {
   struct route_node *rp;
   struct ripng_info *rinfo;
@@ -1359,7 +1359,7 @@
   int sock;
   struct sockaddr_in6 from;
   struct ripng_packet *packet;
-  unsigned int ifindex = 0;
+  ifindex_t ifindex = 0;
   struct interface *ifp;
   int hoplimit = -1;