diff --git a/libnozzle/libnozzle.h b/libnozzle/libnozzle.h
index d3ae8b54..e97254d8 100644
--- a/libnozzle/libnozzle.h
+++ b/libnozzle/libnozzle.h
@@ -1,53 +1,50 @@
 /*
  * Copyright (C) 2010-2018 Red Hat, Inc.  All rights reserved.
  *
  * Author: Fabio M. Di Nitto <fabbione@kronosnet.org>
  *
  * This software licensed under GPL-2.0+, LGPL-2.0+
  */
 
 #ifndef __LIBNOZZLE_H__
 #define __LIBNOZZLE_H__
 
 #include <sys/types.h>
-
-#ifndef IFNAMSIZ
-#define IFNAMSIZ 16
-#endif
+#include <net/if.h>
 
 /**
  *
  * @file libnozzle.h
  * @brief tap interfaces management API include file
  * @copyright Copyright (C) 2010-2017 Red Hat, Inc.  All rights reserved.
  *
  * nozzle is a commodity library to manage tap (ethernet) interfaces
  */
 
 typedef struct _iface *tap_t;
 
 tap_t tap_open(char *dev, size_t dev_size, const char *updownpath);
 int tap_close(tap_t tap);
 
 tap_t tap_find(char *dev, size_t dev_size);
 
 int tap_get_fd(const tap_t tap);
 
 const char *tap_get_name(const tap_t tap);
 
 int tap_get_mtu(const tap_t tap);
 int tap_set_mtu(tap_t tap, const int mtu);
 int tap_reset_mtu(tap_t tap);
 
 int tap_get_mac(const tap_t tap, char **ether_addr);
 int tap_set_mac(tap_t tap, const char *ether_addr);
 int tap_reset_mac(tap_t tap);
 
 int tap_set_up(tap_t tap, char **error_preup, char **error_up);
 int tap_set_down(tap_t tap, char **error_down, char **error_postdown);
 
 int tap_add_ip(tap_t tap, const char *ip_addr, const char *prefix, char **error_string);
 int tap_del_ip(tap_t tap, const char *ip_addr, const char *prefix, char **error_string);
 int tap_get_ips(const tap_t tap, char **ip_addr_list, int *entries);
 
 #endif