diff --git a/drivers/net/tun.c b/drivers/net/tun.c
index 9142db847ee156f8e29dab9856cbcc90021ac541..1588469844e77af30596c4498eb0bde9257e0293 100644
--- a/drivers/net/tun.c
+++ b/drivers/net/tun.c
@@ -1985,7 +1985,7 @@ static long __tun_chr_ioctl(struct file *file, unsigned int cmd,
 	int le;
 	int ret;
 
-	if (cmd == TUNSETIFF || cmd == TUNSETQUEUE || _IOC_TYPE(cmd) == 0x89) {
+	if (cmd == TUNSETIFF || cmd == TUNSETQUEUE || _IOC_TYPE(cmd) == SOCK_IOC_TYPE) {
 		if (copy_from_user(&ifr, argp, ifreq_len))
 			return -EFAULT;
 	} else {
diff --git a/include/uapi/linux/sockios.h b/include/uapi/linux/sockios.h
index 83cc54ce6081e572984e7ba3c793c5adc7459a6f..79d029d2531005167c13869ba3c136c029aa6665 100644
--- a/include/uapi/linux/sockios.h
+++ b/include/uapi/linux/sockios.h
@@ -24,6 +24,8 @@
 #define SIOCINQ		FIONREAD
 #define SIOCOUTQ	TIOCOUTQ        /* output queue size (not sent + not acked) */
 
+#define SOCK_IOC_TYPE	0x89
+
 /* Routing table calls. */
 #define SIOCADDRT	0x890B		/* add routing table entry	*/
 #define SIOCDELRT	0x890C		/* delete routing table entry	*/