diff --git a/zebra/kernel_socket.c b/zebra/kernel_socket.c
index 10cc48c..5e68c56 100644
--- a/zebra/kernel_socket.c
+++ b/zebra/kernel_socket.c
@@ -1020,7 +1020,7 @@
       if (rtm->rtm_type != RTM_GET && rtm->rtm_pid == pid)
         return;
       struct prefix_ipv6 p;
-      unsigned int ifindex = 0;
+      ifindex_t ifindex = 0;
 
       p.family = AF_INET6;
       p.prefix = dest.sin6.sin6_addr;