--- a/driver/wl_linux.c
+++ b/driver/wl_linux.c
@@ -1410,7 +1410,7 @@ wl_alloc_if(wl_info_t *wl, int iftype, u
 	dev = alloc_etherdev(sizeof(wl_if_t));
 	wlif = netdev_priv(dev);
 	bzero(wlif, sizeof(wl_if_t));
-	strncpy(dev->name, name, IFNAMSIZ);
+	snprintf(dev->name, IFNAMSIZ, name, subunit);
 
 	wlif->type = iftype;
 	wlif->dev = dev;
