diff --git a/headers/posix/sys/sockio.h b/headers/posix/sys/sockio.h
index 176a13eb0a..c5c3dc5f27 100644
--- a/headers/posix/sys/sockio.h
+++ b/headers/posix/sys/sockio.h
@@ -52,4 +52,11 @@
 #define SIOCSPGRP			8939	/* set process group */
 #define SIOCGPGRP			8940	/* get process group */
 
+#define SIOCGPRIVATE_0		8941	/* device private 0 */
+#define SIOCGPRIVATE_1		8942	/* device private 1 */
+#define SIOCSDRVSPEC		8943	/* set driver-specific parameters */
+#define SIOCGDRVSPEC		8944	/* get driver-specific parameters */
+
+#define SIOCEND				8944	/* Always set to highest SIOC* */
+
 #endif	/* _SYS_SOCKIO_H */
diff --git a/src/libs/compat/freebsd_network/compat/sys/ioccom.h b/src/libs/compat/freebsd_network/compat/sys/ioccom.h
index 158c95f18e..f6ba2deb2d 100644
--- a/src/libs/compat/freebsd_network/compat/sys/ioccom.h
+++ b/src/libs/compat/freebsd_network/compat/sys/ioccom.h
@@ -6,23 +6,7 @@
 #define _FBSD_COMPAT_SYS_IOCCOM_H_
 
 
-/*
- * Ioctl's have the command encoded in the lower word, and the size of
- * any in or out parameters in the upper word.  The high 3 bits of the
- * upper word are used to encode the in/out status of the parameter.
- */
-#define	IOCPARM_MASK 0x1fff		/* parameter length, at most 13 bits */
-
-#define	IOC_OUT		0x40000000	/* copy out parameters */
-#define	IOC_IN		0x80000000	/* copy in parameters */
-#define	IOC_INOUT	(IOC_IN|IOC_OUT)
-
-
-#define	_IOC(inout,group,num,len) ((unsigned long) \
-	((inout) | (((len) & IOCPARM_MASK) << 16) | ((group) << 8) | (num)))
-
-#define	_IOW(g,n,t)	_IOC(IOC_IN,	(g), (n), sizeof(t))
-/* this should be _IORW, but stdio got there first */
-#define	_IOWR(g,n,t)	_IOC(IOC_INOUT,	(g), (n), sizeof(t))
+#define	_IOW(g,n,t)		SIOCEND + n
+#define	_IOWR(g,n,t)	SIOCEND + n
 
 #endif /* _FBSD_COMPAT_SYS_IOCCOM_H_ */
diff --git a/src/libs/compat/freebsd_network/compat/sys/sockio.h b/src/libs/compat/freebsd_network/compat/sys/sockio.h
index 909b207a96..7d469d7e38 100644
--- a/src/libs/compat/freebsd_network/compat/sys/sockio.h
+++ b/src/libs/compat/freebsd_network/compat/sys/sockio.h
@@ -1,5 +1,5 @@
 /*
- * Copyright 2007 Haiku Inc. All rights reserved.
+ * Copyright 2007-2009 Haiku Inc. All rights reserved.
  * Distributed under the terms of the MIT License.
  */
 #ifndef _FBSD_COMPAT_SYS_SOCKIO_H_
@@ -13,14 +13,4 @@
 
 #define SIOCSIFCAP	SIOCSPACKETCAP
 
-// TODO look whether those ioctls are already used by Haiku
-// and add them to Haiku's sockio.h eventually
-#define	SIOCGPRIVATE_0	_IOWR('i', 80, struct ifreq)	/* device private 0 */
-#define	SIOCGPRIVATE_1	_IOWR('i', 81, struct ifreq)	/* device private 1 */
-
-#define	SIOCSDRVSPEC	_IOW('i', 123, struct ifdrv)	/* set driver-specific
-								  parameters */
-#define	SIOCGDRVSPEC	_IOWR('i', 123, struct ifdrv)	/* get driver-specific
-								  parameters */
-
 #endif