diff --git a/userspace/libraries/LibC/include/net/if.h b/userspace/libraries/LibC/include/net/if.h
index 6d7b52bb..4c0fcf98 100644
--- a/userspace/libraries/LibC/include/net/if.h
+++ b/userspace/libraries/LibC/include/net/if.h
@@ -7,10 +7,11 @@
 
 #include <sys/socket.h>
 
-#define IF_NAMESIZE 16
-
 __BEGIN_DECLS
 
+#define IF_NAMESIZE 16
+#define IFNAMSIZ IF_NAMESIZE
+
 struct if_nameindex
 {
 	unsigned if_index;	/* Numeric index of the interface. */
@@ -28,23 +29,29 @@ struct ifreq
 		struct sockaddr ifru_netmask;
 		struct sockaddr ifru_gwaddr;
 		struct sockaddr ifru_hwaddr;
+		int ifru_flags;
+		int ifru_mtu;
 		unsigned char __min_storage[sizeof(struct sockaddr) + 6];
 	} ifr_ifru;
 };
 #define ifr_name    ifr_ifrn.ifrn_name
 #define ifr_addr    ifr_ifru.ifru_addr
-#define ifr_netmask ifr_ifru.ifru_addrnetmask
-#define ifr_gwaddr  ifr_ifru.ifru_addrgwaddr
-#define ifr_hwaddr  ifr_ifru.ifru_addrhwaddr
+#define ifr_netmask ifr_ifru.ifru_netmask
+#define ifr_gwaddr  ifr_ifru.ifru_gwaddr
+#define ifr_hwaddr  ifr_ifru.ifru_hwaddr
+#define ifr_flags   ifr_ifru.ifru_flags
+#define ifr_mtu     ifr_ifru.ifru_mtu
 
-#define SIOCGIFADDR		1	/* Get interface address */
-#define SIOCSIFADDR		2	/* Set interface address */
-#define SIOCGIFNETMASK	3	/* Get network mask */
-#define SIOCSIFNETMASK	4	/* Set network mask */
-#define SIOCGIFGWADDR	5	/* Get gateway address */
-#define SIOCSIFGWADDR	6	/* Set gateway address */
-#define SIOCGIFHWADDR	7	/* Get hardware address */
-#define SIOCGIFNAME		8	/* Get interface name */
+#define SIOCGIFADDR     1 /* Get interface address */
+#define SIOCSIFADDR     2 /* Set interface address */
+#define SIOCGIFNETMASK  3 /* Get network mask */
+#define SIOCSIFNETMASK  4 /* Set network mask */
+#define SIOCGIFGWADDR   5 /* Get gateway address */
+#define SIOCSIFGWADDR   6 /* Set gateway address */
+#define SIOCGIFHWADDR   7 /* Get hardware address */
+#define SIOCGIFNAME     8 /* Get interface name */
+#define SIOCGIFFLAGS    9
+#define SIOCGIFMTU     10
 
 void					if_freenameindex(struct if_nameindex* ptr);
 char*					if_indextoname(unsigned ifindex, char* ifname);