diff --git a/zebra/rtadv.c b/zebra/rtadv.c
index 7bb9305..9450f9a 100644
--- a/zebra/rtadv.c
+++ b/zebra/rtadv.c
@@ -70,7 +70,7 @@
 
 static int
 rtadv_recv_packet (int sock, u_char *buf, int buflen,
-		   struct sockaddr_in6 *from, unsigned int *ifindex,
+		   struct sockaddr_in6 *from, ifindex_t *ifindex,
 		   int *hoplimit)
 {
   int ret;
@@ -408,7 +408,7 @@
 }
 
 static void
-rtadv_process_packet (u_char *buf, unsigned int len, unsigned int ifindex,
+rtadv_process_packet (u_char *buf, unsigned int len, ifindex_t ifindex,
     int hoplimit, vrf_id_t vrf_id)
 {
   struct icmp6_hdr *icmph;
@@ -472,7 +472,7 @@
   int len;
   u_char buf[RTADV_MSG_SIZE];
   struct sockaddr_in6 from;
-  unsigned int ifindex = 0;
+  ifindex_t ifindex = 0;
   int hoplimit = -1;
   struct zebra_vrf *zvrf = THREAD_ARG (thread);