diff --git a/src/os/darwin/darwin_sigar.c b/src/os/darwin/darwin_sigar.c
index 2e5ae26e..17785878 100644
--- a/src/os/darwin/darwin_sigar.c
+++ b/src/os/darwin/darwin_sigar.c
@@ -2444,6 +2444,7 @@ 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);
diff --git a/src/os/win32/sigar_os.h b/src/os/win32/sigar_os.h
index 936c81f0..537cdd0d 100644
--- a/src/os/win32/sigar_os.h
+++ b/src/os/win32/sigar_os.h
@@ -547,6 +547,7 @@ struct sigar_t {
     sigar_cache_t *netif_adapters;
     sigar_cache_t *netif_mib_rows;
     sigar_cache_t *netif_addr_rows;
+    sigar_cache_t *netif_names; /* dwIndex -> net_interface_config.name */
 
     WORD ws_version;
     int ws_error;
diff --git a/src/os/win32/win32_sigar.c b/src/os/win32/win32_sigar.c
index ccbc8c37..9c0058e6 100644
--- a/src/os/win32/win32_sigar.c
+++ b/src/os/win32/win32_sigar.c
@@ -550,6 +550,7 @@ int sigar_os_open(sigar_t **sigar_ptr)
     sigar->netif_mib_rows = NULL;
     sigar->netif_addr_rows = NULL;
     sigar->netif_adapters = NULL;
+    sigar->netif_names = NULL;
     sigar->pinfo.pid = -1;
     sigar->ws_version = 0;
     sigar->lcpu = -1;
@@ -599,6 +600,10 @@ int sigar_os_close(sigar_t *sigar)
         sigar_cache_destroy(sigar->netif_adapters);
     }
 
+    if (sigar->netif_names) {
+        sigar_cache_destroy(sigar->netif_names);
+    }
+
     free(sigar);
 
     return retval;
@@ -2473,6 +2478,10 @@ SIGAR_DECLARE(int) sigar_net_route_list_get(sigar_t *sigar,
         return GetLastError();
     }
 
+    if (!sigar->netif_names) {
+        sigar_net_interface_list_get(sigar, NULL);
+    }
+
     sigar_net_route_list_create(routelist);
     routelist->size = routelist->number = 0;
 
@@ -2480,6 +2489,7 @@ SIGAR_DECLARE(int) sigar_net_route_list_get(sigar_t *sigar,
 
     for (i=0; i<ipt->dwNumEntries; i++) {
         MIB_IPFORWARDROW *ipr = ipt->table + i;
+        sigar_cache_entry_t *entry;
 
         SIGAR_NET_ROUTE_LIST_GROW(routelist);
 
@@ -2503,6 +2513,11 @@ SIGAR_DECLARE(int) sigar_net_route_list_get(sigar_t *sigar,
         {
             route->flags |= SIGAR_RTF_GATEWAY;
         }
+
+        entry = sigar_cache_get(sigar->netif_names, ipr->dwForwardIfIndex);
+        if (entry->value) {
+            SIGAR_SSTRCPY(route->ifname, (char *)entry->value);
+        }
     }
 
     free(buffer);
@@ -2606,6 +2621,11 @@ sigar_net_interface_list_get(sigar_t *sigar,
             sigar_netif_cache_new(sigar);
     }
 
+    if (!sigar->netif_names) {
+        sigar->netif_names =
+            sigar_netif_cache_new(sigar);
+    }
+
     if ((status = sigar_get_if_table(sigar, &ift)) != SIGAR_OK) {
         return status;
     }
@@ -2647,6 +2667,12 @@ sigar_net_interface_list_get(sigar_t *sigar,
             entry->value = malloc(sizeof(*ifr));
         }
         memcpy(entry->value, ifr, sizeof(*ifr));
+
+        /* save dwIndex -> name mapping for use by route_list */
+        entry = sigar_cache_get(sigar->netif_names, ifr->dwIndex);
+        if (!entry->value) {
+            entry->value = sigar_strdup(name);
+        }
     }
 
     return SIGAR_OK;