diff --git a/headers/posix/sys/sockio.h b/headers/posix/sys/sockio.h
deleted file mode 100644
index a9b6f55327..0000000000
--- a/headers/posix/sys/sockio.h
+++ /dev/null
@@ -1,65 +0,0 @@
-/* net_ioctl.h */
-
-#ifndef SYS_NET_IOCTL_H
-#define SYS_NET_IOCTL_H
-
-#define IOCPARM_MASK    0x1fff          /* parameter length, at most 13 bits */
-
-#define IOC_OUT         (unsigned long)0x40000000
-                                /* copy parameters in */
-#define IOC_IN          (unsigned long)0x80000000
-                                /* copy paramters in and out */
-#define IOC_INOUT       (IOC_IN|IOC_OUT)
-                                /* mask for IN/OUT/VOID */
-
-#define _IOC(inout,group,num,len) \
-        (inout | ((len & IOCPARM_MASK) << 16) | ((group) << 8) | (num))
-
-#define IOCGROUP(x)     (((x) >> 8) & 0xff)
-
-#define _IOR(g,n,t)	_IOC(IOC_OUT,   (g), (n), sizeof(t))
-#define _IOW(g,n,t)	_IOC(IOC_IN,    (g), (n), sizeof(t))
-#define _IOWR(g,n,t)	_IOC(IOC_INOUT, (g), (n), sizeof(t))
-
-#define FIONBIO		_IOW('f', 126, int)		/* set/clear non-blocking i/o */
-#define FIONREAD	_IOR('f', 127, int)		/* get # bytes to read */
-
-#define SIOCSHIWAT      _IOW('s',  0, int)             /* set high watermark */
-#define SIOCGHIWAT      _IOR('s',  1, int)             /* get high watermark */
-#define SIOCSLOWAT      _IOW('s',  2, int)             /* set low watermark */
-#define SIOCGLOWAT      _IOR('s',  3, int)             /* get low watermark */
-#define SIOCATMARK      _IOR('s',  7, int)             /* at oob mark? */
-
-#define SIOCADDRT       _IOW('r', 10, struct ortentry) /* add route */
-#define SIOCDELRT       _IOW('r', 11, struct ortentry) /* delete route */
-
-#define SIOCSIFADDR     _IOW('i', 12, struct ifreq)    /* set ifnet address */
-#define OSIOCGIFADDR    _IOWR('i', 13, struct ifreq)    /* get ifnet address */
-#define SIOCGIFADDR     _IOWR('i', 33, struct ifreq)    /* get ifnet address */
-#define SIOCSIFDSTADDR  _IOW('i', 14, struct ifreq)    /* set p-p address */
-#define OSIOCGIFDSTADDR _IOWR('i', 15, struct ifreq)    /* get p-p address */
-#define SIOCGIFDSTADDR  _IOWR('i', 34, struct ifreq)    /* get p-p address */
-#define SIOCSIFFLAGS    _IOW('i', 16, struct ifreq)    /* set ifnet flags */
-#define SIOCGIFFLAGS    _IOWR('i', 17, struct ifreq)    /* get ifnet flags */
-#define OSIOCGIFBRDADDR _IOWR('i', 18, struct ifreq)    /* get broadcast addr */
-#define SIOCGIFBRDADDR  _IOWR('i', 35, struct ifreq)    /* get broadcast addr */
-#define SIOCSIFBRDADDR  _IOW('i', 19, struct ifreq)    /* set broadcast addr */
-#define OSIOCGIFCONF    _IOWR('i', 20, struct ifconf)   /* get ifnet list */
-#define SIOCGIFCONF     _IOWR('i', 36, struct ifconf)   /* get ifnet list */
-#define OSIOCGIFNETMASK _IOWR('i', 21, struct ifreq)    /* get net addr mask */
-#define SIOCGIFNETMASK  _IOWR('i', 37, struct ifreq)    /* get net addr mask */
-#define SIOCSIFNETMASK  _IOW('i', 22, struct ifreq)    /* set net addr mask */
-#define SIOCGIFMETRIC   _IOWR('i', 23, struct ifreq)    /* get IF metric */
-#define SIOCSIFMETRIC   _IOW('i', 24, struct ifreq)    /* set IF metric */
-#define SIOCDIFADDR     _IOW('i', 25, struct ifreq)    /* delete IF addr */
-#define SIOCAIFADDR      _IOW('i', 26, struct ifaliasreq)/* add/chg IF alias */
-#define SIOCGIFDATA     _IOWR('i', 27, struct ifreq)    /* get if_data */
-
-#define SIOCGIFMTU      _IOWR('i', 126, struct ifreq)   /* get ifnet MTU */
-#define SIOCSIFMTU      _IOW('i', 127, struct ifreq)    /* set ifnet MTU */
-
-#define SIOCADDMULTI    _IOW('i', 49, struct ifreq)    /* add m'cast addr */
-#define SIOCDELMULTI    _IOW('i', 50, struct ifreq)    /* del m'cast addr */
-
-#endif /* SYS_NET_IOCTL_H */
-