diff --git a/src/os/darwin/darwin_sigar.c b/src/os/darwin/darwin_sigar.c
index 0ca030b7..149ee453 100644
--- a/src/os/darwin/darwin_sigar.c
+++ b/src/os/darwin/darwin_sigar.c
@@ -2416,6 +2416,7 @@ int sigar_net_route_list_get(sigar_t *sigar,
         SIGAR_ZERO(route);
 
         route->flags = rtm->rtm_flags;
+        if_indextoname(rtm->rtm_index, route->ifname);
 
         for (bit=RTA_DST;
              bit && ((char *)sa < lim);