diff --git a/winsup/cygwin/ChangeLog b/winsup/cygwin/ChangeLog
index 217631667..3bcab6489 100644
--- a/winsup/cygwin/ChangeLog
+++ b/winsup/cygwin/ChangeLog
@@ -1,3 +1,8 @@
+Wed Jun  7 13:47:00 2000  Corinna Vinschen <corinna@vinschen.de>
+
+	* include/netinet/in_systm.h: New file.
+	* include/cygwin/in_systm.h: Ditto.
+
 Thu Jun  1 01:55:45 2000  Christopher Faylor <cgf@cygnus.com>
 
 	* exceptions.cc: Remove unneeded include.
diff --git a/winsup/cygwin/include/cygwin/in_systm.h b/winsup/cygwin/include/cygwin/in_systm.h
new file mode 100644
index 000000000..1a2c1b2e7
--- /dev/null
+++ b/winsup/cygwin/include/cygwin/in_systm.h
@@ -0,0 +1,34 @@
+/* System specific type definitions for networking code.
+ *
+ * Version:     @(#)in_systm.h        1.0.0   06/07/00
+ *
+ * Authors:     Original taken from the GNU Project <netinet/in_systm.h> file.
+ *              Fred N. van Kempen, <waltje@uWalt.NL.Mugnet.ORG>
+ *
+ *              This program is free software; you can redistribute it and/or
+ *              modify it under the terms of the GNU General Public License
+ *              as published by the Free Software Foundation; either version
+ *              2 of the License, or (at your option) any later version.
+ */
+#ifndef _CYGWIN_IN_SYSTM_H
+#define _CYGWIN_IN_SYSTM_H
+
+#include <sys/cdefs.h>
+#include <sys/types.h>
+
+__BEGIN_DECLS
+
+/*
+ * Network order versions of various data types. Unfortunately, BSD
+ * assumes specific sizes for shorts (16 bit) and longs (32 bit) which
+ * don't hold in general. As a consequence, the network order versions
+ * may not reflect the actual size of the native data types.
+ */
+
+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   */
+
+__END_DECLS
+
+#endif /* _CYGWIN_IN_SYSTM_H */
diff --git a/winsup/cygwin/include/netinet/in_systm.h b/winsup/cygwin/include/netinet/in_systm.h
new file mode 100644
index 000000000..959612279
--- /dev/null
+++ b/winsup/cygwin/include/netinet/in_systm.h
@@ -0,0 +1,6 @@
+#ifndef _NETINET_IN_SYSTM_H
+#define _NETINET_IN_SYSTM_H
+
+#include <cygwin/in_systm.h>
+
+#endif /* _NETINET_IN_SYSTM_H */