diff --git a/isisd/isis_route.c b/isisd/isis_route.c
index 0348a79..9cca809 100644
--- a/isisd/isis_route.c
+++ b/isisd/isis_route.c
@@ -50,7 +50,7 @@
 #include "isis_zebra.h"
 
 static struct isis_nexthop *
-isis_nexthop_create (struct in_addr *ip, unsigned int ifindex)
+isis_nexthop_create (struct in_addr *ip, ifindex_t ifindex)
 {
   struct listnode *node;
   struct isis_nexthop *nexthop;
@@ -91,7 +91,7 @@
 
 static int
 nexthoplookup (struct list *nexthops, struct in_addr *ip,
-	       unsigned int ifindex)
+	       ifindex_t ifindex)
 {
   struct listnode *node;
   struct isis_nexthop *nh;
@@ -130,7 +130,7 @@
 
 #ifdef HAVE_IPV6
 static struct isis_nexthop6 *
-isis_nexthop6_new (struct in6_addr *ip6, unsigned int ifindex)
+isis_nexthop6_new (struct in6_addr *ip6, ifindex_t ifindex)
 {
   struct isis_nexthop6 *nexthop6;
 
@@ -144,7 +144,7 @@
 }
 
 static struct isis_nexthop6 *
-isis_nexthop6_create (struct in6_addr *ip6, unsigned int ifindex)
+isis_nexthop6_create (struct in6_addr *ip6, ifindex_t ifindex)
 {
   struct listnode *node;
   struct isis_nexthop6 *nexthop6;
@@ -181,7 +181,7 @@
 
 static int
 nexthop6lookup (struct list *nexthops6, struct in6_addr *ip6,
-		unsigned int ifindex)
+		ifindex_t ifindex)
 {
   struct listnode *node;
   struct isis_nexthop6 *nh6;