diff --git a/zebra/rib.h b/zebra/rib.h
index 6e0966a..fbf4fc4 100644
--- a/zebra/rib.h
+++ b/zebra/rib.h
@@ -66,6 +66,10 @@
   /* Metric */
   u_int32_t metric;
 
+  /* MTU */
+  u_int32_t mtu;
+  u_int32_t nexthop_mtu;
+
   /* Distance. */
   u_char distance;
 
@@ -494,7 +498,7 @@
 extern int rib_add_ipv4 (int type, int flags, struct prefix_ipv4 *p, 
 			 struct in_addr *gate, struct in_addr *src,
 			 unsigned int ifindex, vrf_id_t vrf_id, int table_id,
-			 u_int32_t, u_char, safi_t);
+			 u_int32_t, u_int32_t, u_char, safi_t);
 
 extern int rib_add_ipv4_multipath (struct prefix_ipv4 *, struct rib *, safi_t);
 
@@ -531,7 +535,8 @@
 extern int
 rib_add_ipv6 (int type, int flags, struct prefix_ipv6 *p,
 	      struct in6_addr *gate, unsigned int ifindex, vrf_id_t vrf_id,
-	      int table_id, u_int32_t metric, u_char distance, safi_t safi);
+	      int table_id, u_int32_t metric, u_int32_t mtu,
+	      u_char distance, safi_t safi);
 
 extern int
 rib_delete_ipv6 (int type, int flags, struct prefix_ipv6 *p,