diff --git a/libc/include/netinet/in_systm.h b/libc/include/netinet/in_systm.h
new file mode 100644
index 0000000..ff53fb7
--- /dev/null
+++ b/libc/include/netinet/in_systm.h
@@ -0,0 +1,59 @@
+/*	$NetBSD: in_systm.h,v 1.13 2005/12/10 23:36:23 elad Exp $	*/
+
+/*
+ * Copyright (c) 1982, 1986, 1993
+ *	The Regents of the University of California.  All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ * 3. Neither the name of the University nor the names of its contributors
+ *    may be used to endorse or promote products derived from this software
+ *    without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ *
+ *	@(#)in_systm.h	8.1 (Berkeley) 6/10/93
+ */
+
+#ifndef _NETINET_IN_SYSTM_H_
+#define _NETINET_IN_SYSTM_H_
+
+/*
+ * Miscellaneous internetwork
+ * definitions for kernel.
+ */
+
+/*
+ * Network types.
+ *
+ * Internally the system keeps counters in the headers with the bytes
+ * swapped so that VAX instructions will work on them.  It reverses
+ * the bytes before transmission at each protocol level.  The n_ types
+ * represent the types with the bytes in ``high-ender'' order.
+ */
+typedef u_int16_t n_short;		/* short as received from the net */
+typedef u_int32_t n_long;		/* long as received from the net */
+
+typedef u_int32_t n_time;		/* ms since 00:00 GMT, byte rev */
+
+#ifdef _KERNEL
+n_time	 iptime (void);
+#endif
+
+#endif /* !_NETINET_IN_SYSTM_H_ */